diff --git a/src/include/api/class-wc-retailcrm-client-v5.php b/src/include/api/class-wc-retailcrm-client-v5.php
index 222f784..d0768c5 100644
--- a/src/include/api/class-wc-retailcrm-client-v5.php
+++ b/src/include/api/class-wc-retailcrm-client-v5.php
@@ -23,6 +23,7 @@ if ( ! class_exists( 'WC_Retailcrm_Response' ) ) {
 class WC_Retailcrm_Client_V5
 {
     protected $client;
+    protected $unversionedClient;
 
     /**
      * Site code
@@ -36,7 +37,7 @@ class WC_Retailcrm_Client_V5
      * @param string $apiKey api key
      * @param string $site   site code
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      */
     public function __construct($url, $apiKey, $version = null, $site = null)
@@ -45,9 +46,11 @@ class WC_Retailcrm_Client_V5
             $url .= '/';
         }
 
+        $unversionedUrl = $url . 'api';
         $url = $version == null ? $url . 'api' : $url . 'api/' . $version;
 
         $this->client = new WC_Retailcrm_Request($url, array('apiKey' => $apiKey));
+        $this->unversionedClient = new WC_Retailcrm_Request($unversionedUrl, array('apiKey' => $apiKey));
         $this->siteCode = $site;
     }
 
@@ -58,7 +61,623 @@ class WC_Retailcrm_Client_V5
      */
     public function apiVersions()
     {
-        return $this->client->makeRequest('/api-versions', WC_Retailcrm_Request::METHOD_GET);
+        return $this->unversionedClient->makeRequest('/api-versions', WC_Retailcrm_Request::METHOD_GET);
+    }
+
+    /**
+     * Returns credentials list
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function credentials()
+    {
+        return $this->unversionedClient->makeRequest('/credentials', WC_Retailcrm_Request::METHOD_GET);
+    }
+
+    /**
+     * Returns filtered corporate customers list
+     *
+     * @param array $filter (default: array())
+     * @param int   $page   (default: null)
+     * @param int   $limit  (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateList(array $filter = [], $page = null, $limit = null)
+    {
+        $parameters = [];
+        if (count($filter)) {
+            $parameters['filter'] = $filter;
+        }
+        if (null !== $page) {
+            $parameters['page'] = (int) $page;
+        }
+        if (null !== $limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/customers-corporate',
+            "GET",
+            $parameters
+        );
+    }
+
+    /**
+     * Create a corporate customer
+     *
+     * @param array  $customerCorporate corporate customer data
+     * @param string $site     (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateCreate(array $customerCorporate, $site = null)
+    {
+        if (! count($customerCorporate)) {
+            throw new InvalidArgumentException(
+                'Parameter `customerCorporate` must contains a data'
+            );
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/customers-corporate/create',
+            "POST",
+            $this->fillSite($site, ['customerCorporate' => json_encode($customerCorporate)])
+        );
+    }
+
+    /**
+     * Save corporate customer IDs' (id and externalId) association in the CRM
+     *
+     * @param array $ids ids mapping
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateFixExternalIds(array $ids)
+    {
+        if (! count($ids)) {
+            throw new InvalidArgumentException(
+                'Method parameter must contains at least one IDs pair'
+            );
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/customers-corporate/fix-external-ids',
+            "POST",
+            ['customersCorporate' => json_encode($ids)]
+        );
+    }
+
+    /**
+     * Get corporate customers history
+     * @param array $filter
+     * @param null $page
+     * @param null $limit
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateHistory(array $filter = [], $page = null, $limit = null)
+    {
+        $parameters = [];
+        if (count($filter)) {
+            $parameters['filter'] = $filter;
+        }
+        if (null !== $page) {
+            $parameters['page'] = (int) $page;
+        }
+        if (null !== $limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/customers-corporate/history',
+            "GET",
+            $parameters
+        );
+    }
+
+    /**
+     * Returns filtered corporate customers notes list
+     *
+     * @param array $filter (default: array())
+     * @param int   $page   (default: null)
+     * @param int   $limit  (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateNotesList(array $filter = [], $page = null, $limit = null)
+    {
+        $parameters = [];
+        if (count($filter)) {
+            $parameters['filter'] = $filter;
+        }
+        if (null !== $page) {
+            $parameters['page'] = (int) $page;
+        }
+        if (null !== $limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/customers-corporate/notes',
+            "GET",
+            $parameters
+        );
+    }
+
+    /**
+     * Create corporate customer note
+     *
+     * @param array $note (default: array())
+     * @param string $site     (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateNotesCreate($note, $site = null)
+    {
+        if (empty($note['customer']['id']) && empty($note['customer']['externalId'])) {
+            throw new InvalidArgumentException(
+                'Customer identifier must be set'
+            );
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/customers-corporate/notes/create',
+            "POST",
+            $this->fillSite($site, ['note' => json_encode($note)])
+        );
+    }
+
+    /**
+     * Delete corporate customer note
+     *
+     * @param integer $id
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateNotesDelete($id)
+    {
+        if (empty($id)) {
+            throw new InvalidArgumentException(
+                'Note id must be set'
+            );
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/notes/$id/delete",
+            "POST"
+        );
+    }
+
+    /**
+     * Upload array of the corporate customers
+     *
+     * @param array  $customersCorporate array of corporate customers
+     * @param string $site               (default: null)
+     *
+     * @return WC_Retailcrm_Response
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @throws InvalidArgumentException
+     */
+    public function customersCorporateUpload(array $customersCorporate, $site = null)
+    {
+        if (!count($customersCorporate)) {
+            throw new InvalidArgumentException(
+                'Parameter `customersCorporate` must contains array of the corporate customers'
+            );
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/customers-corporate/upload',
+            "POST",
+            $this->fillSite($site, ['customersCorporate' => json_encode($customersCorporate)])
+        );
+    }
+
+    /**
+     * Get corporate customer by id or externalId
+     *
+     * @param string $id   corporate customer identifier
+     * @param string $by   (default: 'externalId')
+     * @param string $site (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateGet($id, $by = 'externalId', $site = null)
+    {
+        $this->checkIdParameter($by);
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$id",
+            "GET",
+            $this->fillSite($site, ['by' => $by])
+        );
+    }
+
+    /**
+     * Get corporate customer addresses by id or externalId
+     *
+     * @param string $id     corporate customer identifier
+     * @param array  $filter (default: array())
+     * @param int    $page   (default: null)
+     * @param int    $limit  (default: null)
+     * @param string $by     (default: 'externalId')
+     * @param string $site   (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateAddresses(
+        $id,
+        array $filter = [],
+        $page = null,
+        $limit = null,
+        $by = 'externalId',
+        $site = null
+    ) {
+        $this->checkIdParameter($by);
+        $parameters = ['by' => $by];
+        if (count($filter)) {
+            $parameters['filter'] = $filter;
+        }
+        if (null !== $page) {
+            $parameters['page'] = (int) $page;
+        }
+        if (null !== $limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$id/addresses",
+            "GET",
+            $this->fillSite($site, $parameters)
+        );
+    }
+
+    /**
+     * Create corporate customer address
+     *
+     * @param string $id       corporate customer identifier
+     * @param array  $address  (default: array())
+     * @param string $by       (default: 'externalId')
+     * @param string $site     (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateAddressesCreate($id, array $address = [], $by = 'externalId', $site = null)
+    {
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$id/addresses/create",
+            "POST",
+            $this->fillSite($site, ['address' => json_encode($address), 'by' => $by])
+        );
+    }
+
+    /**
+     * Edit corporate customer address
+     *
+     * @param string $customerId corporate customer identifier
+     * @param string $addressId  corporate customer identifier
+     * @param array  $address    (default: array())
+     * @param string $customerBy (default: 'externalId')
+     * @param string $addressBy  (default: 'externalId')
+     * @param string $site       (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateAddressesEdit(
+        $customerId,
+        $addressId,
+        array $address = [],
+        $customerBy = 'externalId',
+        $addressBy = 'externalId',
+        $site = null
+    ) {
+        $addressFiltered = array_filter($address);
+        if ((count(array_keys($addressFiltered)) <= 1)
+            && (!isset($addressFiltered['text'])
+                || (isset($addressFiltered['text']) && empty($addressFiltered['text']))
+            )
+        ) {
+            throw new InvalidArgumentException(
+                'Parameter `address` must contain address text or all other address field'
+            );
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$customerId/addresses/$addressId/edit",
+            "POST",
+            $this->fillSite($site, [
+                'address' => json_encode($address),
+                'by' => $customerBy,
+                'entityBy' => $addressBy
+            ])
+        );
+    }
+
+    /**
+     * Get corporate customer companies by id or externalId
+     *
+     * @param string $id     corporate customer identifier
+     * @param array  $filter (default: array())
+     * @param int    $page   (default: null)
+     * @param int    $limit  (default: null)
+     * @param string $by     (default: 'externalId')
+     * @param string $site   (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateCompanies(
+        $id,
+        array $filter = [],
+        $page = null,
+        $limit = null,
+        $by = 'externalId',
+        $site = null
+    ) {
+        $this->checkIdParameter($by);
+        $parameters = ['by' => $by];
+        if (count($filter)) {
+            $parameters['filter'] = $filter;
+        }
+        if (null !== $page) {
+            $parameters['page'] = (int) $page;
+        }
+        if (null !== $limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$id/companies",
+            "GET",
+            $this->fillSite($site, $parameters)
+        );
+    }
+
+    /**
+     * Create corporate customer company
+     *
+     * @param string $id       corporate customer identifier
+     * @param array  $company  (default: array())
+     * @param string $by       (default: 'externalId')
+     * @param string $site     (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateCompaniesCreate($id, array $company = [], $by = 'externalId', $site = null)
+    {
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$id/companies/create",
+            "POST",
+            $this->fillSite($site, ['company' => json_encode($company), 'by' => $by])
+        );
+    }
+
+    /**
+     * Edit corporate customer company
+     *
+     * @param string $customerId corporate customer identifier
+     * @param string $companyId  corporate customer identifier
+     * @param array  $company    (default: array())
+     * @param string $customerBy (default: 'externalId')
+     * @param string $companyBy  (default: 'externalId')
+     * @param string $site       (default: null)
+     *
+     * @return WC_Retailcrm_Response
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     */
+    public function customersCorporateCompaniesEdit(
+        $customerId,
+        $companyId,
+        array $company = [],
+        $customerBy = 'externalId',
+        $companyBy = 'externalId',
+        $site = null
+    ) {
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$customerId/companies/$companyId/edit",
+            "POST",
+            $this->fillSite($site, [
+                'company' => json_encode($company),
+                'by' => $customerBy,
+                'entityBy' => $companyBy
+            ])
+        );
+    }
+
+    /**
+     * Get corporate customer contacts by id or externalId
+     *
+     * @param string $id     corporate customer identifier
+     * @param array  $filter (default: array())
+     * @param int    $page   (default: null)
+     * @param int    $limit  (default: null)
+     * @param string $by     (default: 'externalId')
+     * @param string $site   (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateContacts(
+        $id,
+        array $filter = [],
+        $page = null,
+        $limit = null,
+        $by = 'externalId',
+        $site = null
+    ) {
+        $this->checkIdParameter($by);
+        $parameters = ['by' => $by];
+        if (count($filter)) {
+            $parameters['filter'] = $filter;
+        }
+        if (null !== $page) {
+            $parameters['page'] = (int) $page;
+        }
+        if (null !== $limit) {
+            $parameters['limit'] = (int) $limit;
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$id/contacts",
+            "GET",
+            $this->fillSite($site, $parameters)
+        );
+    }
+
+    /**
+     * Create corporate customer contact
+     *
+     * @param string $id      corporate customer identifier
+     * @param array  $contact (default: array())
+     * @param string $by      (default: 'externalId')
+     * @param string $site    (default: null)
+     *
+     * @return WC_Retailcrm_Response
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @throws InvalidArgumentException
+     */
+    public function customersCorporateContactsCreate($id, array $contact = [], $by = 'externalId', $site = null)
+    {
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$id/contacts/create",
+            "POST",
+            $this->fillSite($site, ['contact' => json_encode($contact), 'by' => $by])
+        );
+    }
+
+    /**
+     * Edit corporate customer contact
+     *
+     * @param string $customerId corporate customer identifier
+     * @param string $contactId  corporate customer identifier
+     * @param array  $contact    (default: array())
+     * @param string $customerBy (default: 'externalId')
+     * @param string $contactBy  (default: 'externalId')
+     * @param string $site       (default: null)
+     *
+     * @return WC_Retailcrm_Response
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     */
+    public function customersCorporateContactsEdit(
+        $customerId,
+        $contactId,
+        array $contact = [],
+        $customerBy = 'externalId',
+        $contactBy = 'externalId',
+        $site = null
+    ) {
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            "/customers-corporate/$customerId/contacts/$contactId/edit",
+            "POST",
+            $this->fillSite($site, [
+                'contact' => json_encode($contact),
+                'by' => $customerBy,
+                'entityBy' => $contactBy
+            ])
+        );
+    }
+
+    /**
+     * Edit a corporate customer
+     *
+     * @param array  $customerCorporate corporate customer data
+     * @param string $by       (default: 'externalId')
+     * @param string $site     (default: null)
+     *
+     * @throws InvalidArgumentException
+     * @throws WC_Retailcrm_Exception_Curl
+     * @throws WC_Retailcrm_Exception_Json
+     *
+     * @return WC_Retailcrm_Response
+     */
+    public function customersCorporateEdit(array $customerCorporate, $by = 'externalId', $site = null)
+    {
+        if (!count($customerCorporate)) {
+            throw new InvalidArgumentException(
+                'Parameter `customerCorporate` must contains a data'
+            );
+        }
+        $this->checkIdParameter($by);
+        if (!array_key_exists($by, $customerCorporate)) {
+            throw new InvalidArgumentException(
+                sprintf('Corporate customer array must contain the "%s" parameter.', $by)
+            );
+        }
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            sprintf('/customers-corporate/%s/edit', $customerCorporate[$by]),
+            "POST",
+            $this->fillSite(
+                $site,
+                ['customerCorporate' => json_encode($customerCorporate), 'by' => $by]
+            )
+        );
     }
 
     /**
@@ -70,7 +689,7 @@ class WC_Retailcrm_Client_V5
      *
      * @throws WC_Retailcrm_Exception_Json
      * @throws WC_Retailcrm_Exception_Curl
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return WC_Retailcrm_Response
      */
@@ -102,7 +721,7 @@ class WC_Retailcrm_Client_V5
      *
      * @throws WC_Retailcrm_Exception_Json
      * @throws WC_Retailcrm_Exception_Curl
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return WC_Retailcrm_Response
      */
@@ -124,7 +743,7 @@ class WC_Retailcrm_Client_V5
         $statuses = array("free", "busy", "dinner", "break");
 
         if (empty($status) || !in_array($status, $statuses)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `status` must be not empty & must be equal one of these values: free|busy|dinner|break'
             );
         }
@@ -211,13 +830,13 @@ class WC_Retailcrm_Client_V5
             empty($customField['name']) ||
             empty($customField['type'])
         ) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `customField` must contain a data & fields `code`, `name` & `type` must be set'
             );
         }
 
         if (empty($entity) || $entity != 'customer' || $entity != 'order') {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `entity` must contain a data & value must be `order` or `customer`'
             );
         }
@@ -240,13 +859,13 @@ class WC_Retailcrm_Client_V5
     public function customFieldsEdit($entity, $customField)
     {
         if (!count($customField) || empty($customField['code'])) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `customField` must contain a data & fields `code` must be set'
             );
         }
 
         if (empty($entity) || $entity != 'customer' || $entity != 'order') {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `entity` must contain a data & value must be `order` or `customer`'
             );
         }
@@ -269,13 +888,13 @@ class WC_Retailcrm_Client_V5
     public function customFieldsGet($entity, $code)
     {
         if (empty($code)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `code` must be not empty'
             );
         }
 
         if (empty($entity) || $entity != 'customer' || $entity != 'order') {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `entity` must contain a data & value must be `order` or `customer`'
             );
         }
@@ -329,7 +948,7 @@ class WC_Retailcrm_Client_V5
             empty($customDictionary['code']) ||
             empty($customDictionary['elements'])
         ) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `dictionary` must contain a data & fields `code` & `elemets` must be set'
             );
         }
@@ -354,7 +973,7 @@ class WC_Retailcrm_Client_V5
             empty($customDictionary['code']) ||
             empty($customDictionary['elements'])
         ) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `dictionary` must contain a data & fields `code` & `elemets` must be set'
             );
         }
@@ -376,7 +995,7 @@ class WC_Retailcrm_Client_V5
     public function customDictionariesGet($code)
     {
         if (empty($code)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `code` must be not empty'
             );
         }
@@ -394,7 +1013,7 @@ class WC_Retailcrm_Client_V5
      * @param int   $page   (default: null)
      * @param int   $limit  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -427,7 +1046,7 @@ class WC_Retailcrm_Client_V5
      * @param array  $order order data
      * @param string $site  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -436,7 +1055,7 @@ class WC_Retailcrm_Client_V5
     public function ordersCreate(array $order, $site = null)
     {
         if (!count($order)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `order` must contains a data'
             );
         }
@@ -453,7 +1072,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $ids order identificators
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -462,7 +1081,7 @@ class WC_Retailcrm_Client_V5
     public function ordersFixExternalIds(array $ids)
     {
         if (! count($ids)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Method parameter must contains at least one IDs pair'
             );
         }
@@ -481,7 +1100,7 @@ class WC_Retailcrm_Client_V5
      * @param array $ids         (default: array())
      * @param array $externalIds (default: array())
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -511,7 +1130,7 @@ class WC_Retailcrm_Client_V5
      * @param array  $orders array of orders
      * @param string $site   (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -520,7 +1139,7 @@ class WC_Retailcrm_Client_V5
     public function ordersUpload(array $orders, $site = null)
     {
         if (!count($orders)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `orders` must contains array of the orders'
             );
         }
@@ -539,7 +1158,7 @@ class WC_Retailcrm_Client_V5
      * @param string $by   (default: 'externalId')
      * @param string $site (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -563,7 +1182,7 @@ class WC_Retailcrm_Client_V5
      * @param string $by    (default: 'externalId')
      * @param string $site  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -572,7 +1191,7 @@ class WC_Retailcrm_Client_V5
     public function ordersEdit(array $order, $by = 'externalId', $site = null)
     {
         if (!count($order)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `order` must contains a data'
             );
         }
@@ -580,7 +1199,7 @@ class WC_Retailcrm_Client_V5
         $this->checkIdParameter($by);
 
         if (!array_key_exists($by, $order)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 sprintf('Order array must contain the "%s" parameter.', $by)
             );
         }
@@ -638,13 +1257,13 @@ class WC_Retailcrm_Client_V5
         $techniques = array('ours', 'summ', 'theirs');
 
         if (!count($order) || !count($resultOrder)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameters `order` & `resultOrder` must contains a data'
             );
         }
 
         if (!in_array($technique, $techniques)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `technique` must be on of ours|summ|theirs'
             );
         }
@@ -665,7 +1284,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $payment order data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -674,7 +1293,7 @@ class WC_Retailcrm_Client_V5
     public function ordersPaymentCreate(array $payment)
     {
         if (!count($payment)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `payment` must contains a data'
             );
         }
@@ -698,7 +1317,7 @@ class WC_Retailcrm_Client_V5
     public function ordersPaymentEdit(array $payment, $by = 'externalId', $site = null)
     {
         if (!count($payment)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `payment` must contains a data'
             );
         }
@@ -706,7 +1325,7 @@ class WC_Retailcrm_Client_V5
         $this->checkIdParameter($by);
 
         if (!array_key_exists($by, $payment)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 sprintf('Order array must contain the "%s" parameter.', $by)
             );
         }
@@ -731,7 +1350,7 @@ class WC_Retailcrm_Client_V5
     public function ordersPaymentDelete($id)
     {
         if (!$id) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `id` must be set'
             );
         }
@@ -749,7 +1368,7 @@ class WC_Retailcrm_Client_V5
      * @param int   $page   (default: null)
      * @param int   $limit  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -782,7 +1401,7 @@ class WC_Retailcrm_Client_V5
      * @param array  $customer customer data
      * @param string $site     (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -791,7 +1410,7 @@ class WC_Retailcrm_Client_V5
     public function customersCreate(array $customer, $site = null)
     {
         if (! count($customer)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `customer` must contains a data'
             );
         }
@@ -808,7 +1427,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $ids ids mapping
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -817,7 +1436,7 @@ class WC_Retailcrm_Client_V5
     public function customersFixExternalIds(array $ids)
     {
         if (! count($ids)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Method parameter must contains at least one IDs pair'
             );
         }
@@ -835,7 +1454,7 @@ class WC_Retailcrm_Client_V5
      * @param array  $customers array of customers
      * @param string $site      (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -844,7 +1463,7 @@ class WC_Retailcrm_Client_V5
     public function customersUpload(array $customers, $site = null)
     {
         if (! count($customers)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `customers` must contains array of the customers'
             );
         }
@@ -863,7 +1482,7 @@ class WC_Retailcrm_Client_V5
      * @param string $by   (default: 'externalId')
      * @param string $site (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -887,7 +1506,7 @@ class WC_Retailcrm_Client_V5
      * @param string $by       (default: 'externalId')
      * @param string $site     (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -896,7 +1515,7 @@ class WC_Retailcrm_Client_V5
     public function customersEdit(array $customer, $by = 'externalId', $site = null)
     {
         if (!count($customer)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `customer` must contains a data'
             );
         }
@@ -904,7 +1523,7 @@ class WC_Retailcrm_Client_V5
         $this->checkIdParameter($by);
 
         if (!array_key_exists($by, $customer)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 sprintf('Customer array must contain the "%s" parameter.', $by)
             );
         }
@@ -960,7 +1579,7 @@ class WC_Retailcrm_Client_V5
     {
 
         if (!count($customers) || !count($resultCustomer)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameters `customers` & `resultCustomer` must contains a data'
             );
         }
@@ -982,7 +1601,7 @@ class WC_Retailcrm_Client_V5
      * @param int   $page   (default: null)
      * @param int   $limit  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1013,7 +1632,7 @@ class WC_Retailcrm_Client_V5
      * @param array $note (default: array())
      * @param string $site     (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1022,7 +1641,7 @@ class WC_Retailcrm_Client_V5
     public function customersNotesCreate($note, $site = null)
     {
         if (empty($note['customer']['id']) && empty($note['customer']['externalId'])) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Customer identifier must be set'
             );
         }
@@ -1038,7 +1657,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param integer $id
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1047,7 +1666,7 @@ class WC_Retailcrm_Client_V5
     public function customersNotesDelete($id)
     {
         if (empty($id)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Note id must be set'
             );
         }
@@ -1064,7 +1683,7 @@ class WC_Retailcrm_Client_V5
      * @param int   $page   (default: null)
      * @param int   $limit  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1097,7 +1716,7 @@ class WC_Retailcrm_Client_V5
      * @param array  $pack pack data
      * @param string $site (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1106,7 +1725,7 @@ class WC_Retailcrm_Client_V5
     public function ordersPacksCreate(array $pack, $site = null)
     {
         if (!count($pack)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `pack` must contains a data'
             );
         }
@@ -1125,7 +1744,7 @@ class WC_Retailcrm_Client_V5
      * @param int   $page   (default: null)
      * @param int   $limit  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1157,7 +1776,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param string $id pack identificator
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1166,7 +1785,7 @@ class WC_Retailcrm_Client_V5
     public function ordersPacksGet($id)
     {
         if (empty($id)) {
-            throw new \InvalidArgumentException('Parameter `id` must be set');
+            throw new InvalidArgumentException('Parameter `id` must be set');
         }
 
         return $this->client->makeRequest(
@@ -1180,7 +1799,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param string $id pack identificator
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1189,7 +1808,7 @@ class WC_Retailcrm_Client_V5
     public function ordersPacksDelete($id)
     {
         if (empty($id)) {
-            throw new \InvalidArgumentException('Parameter `id` must be set');
+            throw new InvalidArgumentException('Parameter `id` must be set');
         }
 
         return $this->client->makeRequest(
@@ -1204,7 +1823,7 @@ class WC_Retailcrm_Client_V5
      * @param array  $pack pack data
      * @param string $site (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1213,7 +1832,7 @@ class WC_Retailcrm_Client_V5
     public function ordersPacksEdit(array $pack, $site = null)
     {
         if (!count($pack) || empty($pack['id'])) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `pack` must contains a data & pack `id` must be set'
             );
         }
@@ -1267,7 +1886,7 @@ class WC_Retailcrm_Client_V5
     public function tasksCreate($task, $site = null)
     {
         if (!count($task)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `task` must contain a data'
             );
         }
@@ -1294,7 +1913,7 @@ class WC_Retailcrm_Client_V5
     public function tasksEdit($task, $site = null)
     {
         if (!count($task)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `task` must contain a data'
             );
         }
@@ -1319,7 +1938,7 @@ class WC_Retailcrm_Client_V5
     public function tasksGet($id)
     {
         if (empty($id)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `id` must be not empty'
             );
         }
@@ -1337,7 +1956,7 @@ class WC_Retailcrm_Client_V5
      * @param int   $page   (default: null)
      * @param int   $limit  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1371,7 +1990,7 @@ class WC_Retailcrm_Client_V5
      * @param int   $page   (default: null)
      * @param int   $limit  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1406,14 +2025,14 @@ class WC_Retailcrm_Client_V5
      * @return WC_Retailcrm_Response
      * @throws WC_Retailcrm_Exception_Json
      * @throws WC_Retailcrm_Exception_Curl
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return WC_Retailcrm_Response
      */
     public function storeSettingsGet($code)
     {
         if (empty($code)) {
-            throw new \InvalidArgumentException('Parameter `code` must be set');
+            throw new InvalidArgumentException('Parameter `code` must be set');
         }
 
         return $this->client->makeRequest(
@@ -1429,14 +2048,14 @@ class WC_Retailcrm_Client_V5
      *
      * @throws WC_Retailcrm_Exception_Json
      * @throws WC_Retailcrm_Exception_Curl
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return WC_Retailcrm_Response
      */
     public function storeSettingsEdit(array $configuration)
     {
         if (!count($configuration) || empty($configuration['code'])) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `configuration` must contains a data & configuration `code` must be set'
             );
         }
@@ -1454,7 +2073,7 @@ class WC_Retailcrm_Client_V5
      * @param array  $offers offers data
      * @param string $site   (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1463,7 +2082,7 @@ class WC_Retailcrm_Client_V5
     public function storeInventoriesUpload(array $offers, $site = null)
     {
         if (!count($offers)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `offers` must contains array of the offers'
             );
         }
@@ -1482,7 +2101,7 @@ class WC_Retailcrm_Client_V5
      * @param int   $page   (default: null)
      * @param int   $limit  (default: null)
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1514,7 +2133,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param string $code
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1523,7 +2142,7 @@ class WC_Retailcrm_Client_V5
     public function deliverySettingsGet($code)
     {
         if (empty($code)) {
-            throw new \InvalidArgumentException('Parameter `code` must be set');
+            throw new InvalidArgumentException('Parameter `code` must be set');
         }
 
         return $this->client->makeRequest(
@@ -1539,14 +2158,14 @@ class WC_Retailcrm_Client_V5
      *
      * @throws WC_Retailcrm_Exception_Json
      * @throws WC_Retailcrm_Exception_Curl
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return WC_Retailcrm_Response
      */
     public function deliverySettingsEdit(array $configuration)
     {
         if (!count($configuration) || empty($configuration['code'])) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `configuration` must contains a data & configuration `code` must be set'
             );
         }
@@ -1566,18 +2185,18 @@ class WC_Retailcrm_Client_V5
      *
      * @throws WC_Retailcrm_Exception_Json
      * @throws WC_Retailcrm_Exception_Curl
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return WC_Retailcrm_Response
      */
     public function deliveryTracking($code, array $statusUpdate)
     {
         if (empty($code)) {
-            throw new \InvalidArgumentException('Parameter `code` must be set');
+            throw new InvalidArgumentException('Parameter `code` must be set');
         }
 
         if (!count($statusUpdate)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `statusUpdate` must contains a data'
             );
         }
@@ -1592,7 +2211,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns available county list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1609,7 +2228,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns deliveryServices list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1628,7 +2247,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data delivery service data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1637,7 +2256,7 @@ class WC_Retailcrm_Client_V5
     public function deliveryServicesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -1652,7 +2271,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns deliveryTypes list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1671,7 +2290,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data delivery type data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1680,7 +2299,7 @@ class WC_Retailcrm_Client_V5
     public function deliveryTypesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -1695,7 +2314,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns orderMethods list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1714,7 +2333,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data order method data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1723,7 +2342,7 @@ class WC_Retailcrm_Client_V5
     public function orderMethodsEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -1738,7 +2357,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns orderTypes list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1757,7 +2376,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data order type data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1766,7 +2385,7 @@ class WC_Retailcrm_Client_V5
     public function orderTypesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -1781,7 +2400,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns paymentStatuses list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1800,7 +2419,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data payment status data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1809,7 +2428,7 @@ class WC_Retailcrm_Client_V5
     public function paymentStatusesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -1824,7 +2443,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns paymentTypes list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1843,7 +2462,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data payment type data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1852,7 +2471,7 @@ class WC_Retailcrm_Client_V5
     public function paymentTypesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -1867,7 +2486,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns productStatuses list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1886,7 +2505,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data product status data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1895,7 +2514,7 @@ class WC_Retailcrm_Client_V5
     public function productStatusesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -1910,7 +2529,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns sites list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1929,7 +2548,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data site data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1938,7 +2557,7 @@ class WC_Retailcrm_Client_V5
     public function sitesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -1953,7 +2572,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns statusGroups list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1970,7 +2589,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns statuses list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1989,7 +2608,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data status data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -1998,7 +2617,7 @@ class WC_Retailcrm_Client_V5
     public function statusesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
@@ -2013,7 +2632,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Returns stores list
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -2032,7 +2651,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $data site data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -2041,13 +2660,13 @@ class WC_Retailcrm_Client_V5
     public function storesEdit(array $data)
     {
         if (!array_key_exists('code', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "code" parameter.'
             );
         }
 
         if (!array_key_exists('name', $data)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Data must contain "name" parameter.'
             );
         }
@@ -2066,14 +2685,14 @@ class WC_Retailcrm_Client_V5
      *
      * @throws WC_Retailcrm_Exception_Json
      * @throws WC_Retailcrm_Exception_Curl
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return WC_Retailcrm_Response
      */
     public function telephonySettingsGet($code)
     {
         if (empty($code)) {
-            throw new \InvalidArgumentException('Parameter `code` must be set');
+            throw new InvalidArgumentException('Parameter `code` must be set');
         }
 
         return $this->client->makeRequest(
@@ -2119,13 +2738,13 @@ class WC_Retailcrm_Client_V5
     )
     {
         if (!isset($code)) {
-            throw new \InvalidArgumentException('Code must be set');
+            throw new InvalidArgumentException('Code must be set');
         }
 
         $parameters['code'] = $code;
 
         if (!isset($clientId)) {
-            throw new \InvalidArgumentException('client id must be set');
+            throw new InvalidArgumentException('client id must be set');
         }
 
         $parameters['clientId'] = $clientId;
@@ -2137,7 +2756,7 @@ class WC_Retailcrm_Client_V5
         }
 
         if (!isset($name)) {
-            throw new \InvalidArgumentException('name must be set');
+            throw new InvalidArgumentException('name must be set');
         }
 
         if (isset($name)) {
@@ -2212,15 +2831,15 @@ class WC_Retailcrm_Client_V5
     )
     {
         if (!isset($phone)) {
-            throw new \InvalidArgumentException('Phone number must be set');
+            throw new InvalidArgumentException('Phone number must be set');
         }
 
         if (!isset($type)) {
-            throw new \InvalidArgumentException('Type must be set (in|out|hangup)');
+            throw new InvalidArgumentException('Type must be set (in|out|hangup)');
         }
 
         if (empty($codes)) {
-            throw new \InvalidArgumentException('Codes array must be set');
+            throw new InvalidArgumentException('Codes array must be set');
         }
 
         $parameters['phone'] = $phone;
@@ -2243,7 +2862,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param array $calls calls data
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -2252,7 +2871,7 @@ class WC_Retailcrm_Client_V5
     public function telephonyCallsUpload(array $calls)
     {
         if (!count($calls)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `calls` must contains array of the calls'
             );
         }
@@ -2270,7 +2889,7 @@ class WC_Retailcrm_Client_V5
      * @param string $phone   phone number
      * @param bool   $details detailed information
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -2279,7 +2898,7 @@ class WC_Retailcrm_Client_V5
     public function telephonyCallManager($phone, $details)
     {
         if (!isset($phone)) {
-            throw new \InvalidArgumentException('Phone number must be set');
+            throw new InvalidArgumentException('Phone number must be set');
         }
 
         $parameters['phone'] = $phone;
@@ -2299,14 +2918,14 @@ class WC_Retailcrm_Client_V5
      *
      * @throws WC_Retailcrm_Exception_Json
      * @throws WC_Retailcrm_Exception_Curl
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return WC_Retailcrm_Response
      */
     public function integrationModulesEdit(array $configuration)
     {
         if (!count($configuration) || empty($configuration['code'])) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 'Parameter `configuration` must contains a data & configuration `code` must be set'
             );
         }
@@ -2323,7 +2942,7 @@ class WC_Retailcrm_Client_V5
     /**
      * Update CRM basic statistic
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      * @throws WC_Retailcrm_Exception_Curl
      * @throws WC_Retailcrm_Exception_Json
      *
@@ -2347,6 +2966,30 @@ class WC_Retailcrm_Client_V5
         return $this->siteCode;
     }
 
+    /**
+     * getSingleSiteForKey
+     *
+     * @return string|bool
+     */
+    public function getSingleSiteForKey()
+    {
+        if (!empty($this->getSite())) {
+            return $this->getSite();
+        }
+
+        $response = $this->credentials();
+
+        if ($response instanceof WC_Retailcrm_Response
+            && $response->offsetExists('sitesAvailable')
+            && is_array($response['sitesAvailable'])
+            && !empty($response['sitesAvailable'])
+        ) {
+            $this->siteCode = $response['sitesAvailable'][0];
+        }
+
+        return $this->getSite();
+    }
+
     /**
      * Set site
      *
@@ -2364,7 +3007,7 @@ class WC_Retailcrm_Client_V5
      *
      * @param string $by identify by
      *
-     * @throws \InvalidArgumentException
+     * @throws InvalidArgumentException
      *
      * @return bool
      */
@@ -2376,7 +3019,7 @@ class WC_Retailcrm_Client_V5
         );
 
         if (!in_array($by, $allowedForBy, false)) {
-            throw new \InvalidArgumentException(
+            throw new InvalidArgumentException(
                 sprintf(
                     'Value "%s" for "by" param is not valid. Allowed values are %s.',
                     $by,
diff --git a/src/include/api/class-wc-retailcrm-proxy.php b/src/include/api/class-wc-retailcrm-proxy.php
index 6be9439..3b15166 100644
--- a/src/include/api/class-wc-retailcrm-proxy.php
+++ b/src/include/api/class-wc-retailcrm-proxy.php
@@ -47,6 +47,10 @@ if ( ! class_exists( 'WC_Retailcrm_Proxy' ) ) :
             try {
                 $response = call_user_func_array(array($this->retailcrm, $method), $arguments);
 
+                if (is_string($response)) {
+                    return $response;
+                }
+
                 if ($response->isSuccessful()) {
                     $result = ' Ok';
                 } else {
@@ -57,8 +61,8 @@ if ( ! class_exists( 'WC_Retailcrm_Proxy' ) ) :
                     );
 
                     if (isset($response['errors'])) {
-                            foreach ($response['errors'] as $error) {
-                            $result .= " $error";
+                            foreach ($response['errors'] as $key => $error) {
+                            $result .= " [$key] => $error";
                         }
                     }
                 }
diff --git a/src/include/class-wc-retailcrm-customers.php b/src/include/class-wc-retailcrm-customers.php
index a7a180b..6d0e730 100644
--- a/src/include/class-wc-retailcrm-customers.php
+++ b/src/include/class-wc-retailcrm-customers.php
@@ -16,7 +16,7 @@ if (!class_exists('WC_Retailcrm_Customers')) :
 
         const CUSTOMER_ROLE = 'customer';
 
-        /** @var bool | WC_Retailcrm_Proxy */
+        /** @var bool | WC_Retailcrm_Proxy | \WC_Retailcrm_Client_V5 */
         protected $retailcrm;
 
         /** @var array */
@@ -28,6 +28,18 @@ if (!class_exists('WC_Retailcrm_Customers')) :
         /** @var array */
         private $customer = array();
 
+        /** @var array */
+        private $customerCorporate = array();
+
+        /** @var array */
+        private $customerCorporateContact = array();
+
+        /** @var array */
+        private $customerCorporateCompany = array();
+
+        /** @var array */
+        private $customerCorporateAddress = array();
+
         /**
          * WC_Retailcrm_Customers constructor.
          *
@@ -42,6 +54,79 @@ if (!class_exists('WC_Retailcrm_Customers')) :
             $this->customer_address = $customer_address;
         }
 
+        /**
+         * Returns true if corporate customers are enabled and accessible
+         *
+         * @param WC_Retailcrm_Client_V5|\WC_Retailcrm_Proxy $apiClient
+         *
+         * @return bool
+         */
+        public static function isCorporateEnabledInApi($apiClient)
+        {
+            if (is_object($apiClient)) {
+                $requiredMethods = array(
+                    "/api/customers-corporate",
+                    "/api/customers-corporate/create",
+                    "/api/customers-corporate/fix-external-ids",
+                    "/api/customers-corporate/notes",
+                    "/api/customers-corporate/notes/create",
+                    "/api/customers-corporate/notes/{id}/delete",
+                    "/api/customers-corporate/history",
+                    "/api/customers-corporate/upload",
+                    "/api/customers-corporate/{externalId}",
+                    "/api/customers-corporate/{externalId}/edit"
+                );
+
+                $credentials = $apiClient->credentials();
+
+                if ($credentials && isset($credentials['credentials'])) {
+                    $existingMethods = array_filter(
+                        $credentials['credentials'],
+                        function ($val) use ($requiredMethods) {
+                            return in_array($val, $requiredMethods);
+                        }
+                    );
+
+                    return count($requiredMethods) == count($existingMethods);
+                }
+            }
+
+            return false;
+        }
+
+        /**
+         * Is corporate customers enabled in provided API
+         *
+         * @return bool
+         */
+        public function isCorporateEnabled()
+        {
+            if (!$this->retailcrm) {
+                return false;
+            }
+
+            return static::isCorporateEnabledInApi($this->retailcrm);
+        }
+
+        /**
+         * Returns true if provided customer has company name in billing address.
+         * Note: customer can have company name in address which was added after synchronization.
+         * In that case customer will not be corporate, but this method will return true.
+         *
+         * @param \WC_Customer $customer
+         *
+         * @return bool
+         */
+        public static function customerPossiblyCorporate($customer)
+        {
+            if (!($customer instanceof WC_Customer)) {
+                return false;
+            }
+
+            return !empty($customer->get_billing_company());
+        }
+
+
         /**
          * Upload customers to CRM
          *
@@ -55,7 +140,9 @@ if (!class_exists('WC_Retailcrm_Customers')) :
             }
 
             $users = get_users(array('include' => $ids));
+            $corporateEnabled = $this->isCorporateEnabled();
             $data_customers = array();
+            $data_corporate = array();
 
             foreach ($users as $user) {
                 if (!\in_array(self::CUSTOMER_ROLE, $user->roles)) {
@@ -63,7 +150,19 @@ if (!class_exists('WC_Retailcrm_Customers')) :
                 }
 
                 $customer = $this->wcCustomerGet($user->ID);
-                $this->processCustomer($customer);
+                if ($corporateEnabled && static::customerPossiblyCorporate($customer)) {
+                    $this->processCorporateCustomer($customer);
+                    $data_corporate[] = array(
+                        'customer' => $this->customerCorporate,
+                        'address' => $this->customerCorporateAddress,
+                        'company' => $this->customerCorporateCompany,
+                        'contact' => $this->customerCorporateContact
+                    );
+                } else {
+                    $this->processCustomer($customer);
+                    $data_customers[] = $this->customer;
+                }
+
                 $data_customers[] = $this->customer;
             }
 
@@ -85,6 +184,38 @@ if (!class_exists('WC_Retailcrm_Customers')) :
          * @return mixed
          */
         public function createCustomer($customer)
+        {
+            if ($this->isCorporateEnabled() && static::customerPossiblyCorporate($customer)) {
+                return $this->createCorporateCustomer($customer);
+            } else {
+                return $this->createRegularCustomer($customer);
+            }
+        }
+
+        /**
+         * Update customer in CRM
+         *
+         * @param $customer
+         *
+         * @return void|\WC_Customer
+         */
+        public function updateCustomer($customer)
+        {
+            if ($this->isCorporateEnabled() && static::customerPossiblyCorporate($customer)) {
+                return $this->updateCorporateCustomer($customer);
+            } else {
+                return $this->updateRegularCustomer($customer);
+            }
+        }
+
+        /**
+         * Create regular customer in CRM
+         *
+         * @param int | WC_Customer $customer
+         *
+         * @return mixed
+         */
+        public function createRegularCustomer($customer)
         {
             if (!$this->retailcrm) {
                 return null;
@@ -111,13 +242,13 @@ if (!class_exists('WC_Retailcrm_Customers')) :
         }
 
         /**
-         * Edit customer in CRM
+         * Edit regular customer in CRM
          *
          * @param int $customer_id
          *
          * @return WC_Customer $customer
          */
-        public function updateCustomer($customer_id)
+        public function updateRegularCustomer($customer_id)
         {
             if (!$this->retailcrm) {
                 return;
@@ -133,6 +264,231 @@ if (!class_exists('WC_Retailcrm_Customers')) :
             return $customer;
         }
 
+        /**
+         * Create corporate customer in CRM
+         *
+         * @param int | WC_Customer $customer
+         *
+         * @return mixed
+         */
+        public function createCorporateCustomer($customer)
+        {
+            if (!$this->retailcrm) {
+                return null;
+            }
+
+            if (is_int($customer)) {
+                $customer = $this->wcCustomerGet($customer);
+            }
+
+            if (!$customer instanceof WC_Customer) {
+                return null;
+            }
+
+            if ($customer->get_role() == self::CUSTOMER_ROLE) {
+                $this->processCorporateCustomer($customer);
+                $response = $this->retailcrm->customersCorporateCreate($this->customerCorporate);
+
+                return $this->fillCorporateCustomer($response);
+            }
+
+            return null;
+        }
+
+        /**
+         * Edit customer in CRM
+         *
+         * @param int $customer_id
+         *
+         * @return WC_Customer|void $customer
+         */
+        public function updateCorporateCustomer($customer_id)
+        {
+            if (!$this->retailcrm) {
+                return;
+            }
+
+            $customer = $this->wcCustomerGet($customer_id);
+
+            if ($customer->get_role() == self::CUSTOMER_ROLE){
+                $this->processCorporateCustomer($customer);
+                $response = $this->retailcrm->customersCorporateGet($this->customerCorporate['externalId']);
+
+                $this->fillCorporateCustomer($response);
+            }
+
+            return $customer;
+        }
+
+        /**
+         * Fills corporate customer with required data after customer was created or updated.
+         * Create or update response after sending customer must be passed.
+         *
+         * @param \WC_Retailcrm_Response $response
+         *
+         * @return \WC_Retailcrm_Customer_Corporate_Response|null
+         */
+        protected function fillCorporateCustomer($response)
+        {
+            $customerData = array();
+            $addressId = 0;
+            $companyId = 0;
+            $contactId = 0;
+            $contactExternalId = '';
+
+            if (!$response->isSuccessful()) {
+                return null;
+            }
+
+            if ($response->offsetExists('customerCorporate') && isset($response['customerCorporate']['id'])) {
+                $customerData = $response['customerCorporate'];
+            } else {
+                $customerData = $response;
+            }
+
+            if (!empty($customerData['id'])) {
+                $customerData = $this->retailcrm->customersCorporateGet($customerData['id'], 'id');
+
+                if ($customerData->isSuccessful() && isset($customerData['customerCorporate'])) {
+                    $this->customerCorporate = $customerData['customerCorporate'];
+                    $customerData = $customerData['customerCorporate'];
+
+                    // Create main address or obtain existing address
+                    if (empty($customerData['mainAddress'])) {
+                        $addressCreateResponse = $this->retailcrm->customersCorporateAddressesCreate(
+                            $customerData['id'],
+                            $this->customerCorporateAddress,
+                            'id'
+                        );
+
+                        if ($addressCreateResponse->isSuccessful() && isset($addressCreateResponse['id'])) {
+                            $this->customerCorporateAddress['id'] = $addressCreateResponse['id'];
+                            $addressId = (int) $addressCreateResponse['id'];
+                        }
+                    } else {
+                        $addressEditResponse = $this->retailcrm->customersCorporateAddressesEdit(
+                            $customerData['id'],
+                            $customerData['mainAddress']['id'],
+                            $this->customerCorporateAddress,
+                            'id',
+                            'id'
+                        );
+
+                        if ($addressEditResponse->isSuccessful() && isset($addressEditResponse['id'])) {
+                            $this->customerCorporateAddress['id'] = $addressEditResponse['id'];
+                            $addressId = (int) $addressEditResponse['id'];
+                        }
+                    }
+
+                    // Update address in company if address was obtained / created
+                    if (!empty($this->customerCorporateCompany)
+                        && isset($this->customerCorporateAddress['id'])
+                    ) {
+                        $this->customerCorporateCompany['address'] = array(
+                            'id' => $this->customerCorporateAddress['id']
+                        );
+                    }
+
+                    // Create main company or obtain existing
+                    if (empty($customerData['mainCompany'])) {
+                        $companyCreateResponse = $this->retailcrm->customersCorporateCompaniesCreate(
+                            $customerData['id'],
+                            $this->customerCorporateCompany,
+                            'id'
+                        );
+
+                        if ($companyCreateResponse->isSuccessful() && isset($companyCreateResponse['id'])) {
+                            $this->customerCorporateCompany['id'] = $companyCreateResponse['id'];
+                            $companyId = (int) $companyCreateResponse['id'];
+                        }
+                    } else {
+                        $companyEditResponse = $this->retailcrm->customersCorporateCompaniesEdit(
+                            $customerData['id'],
+                            $customerData['mainCompany']['id'],
+                            $this->customerCorporateCompany,
+                            'id',
+                            'id'
+                        );
+
+                        if ($companyEditResponse->isSuccessful() && isset($companyEditResponse['id'])) {
+                            $this->customerCorporateCompany['id'] = $companyEditResponse['id'];
+                            $companyId = (int) $companyEditResponse['id'];
+                        }
+                    }
+
+                    // Create main customer or obtain existing
+                    if (empty($customerData['mainCustomerContact'])) {
+                        $contactCustomerCreated = false;
+                        $contactCustomerGetResponse =
+                            $this->retailcrm->customersGet($this->customerCorporateContact['externalId']);
+
+                        if ($contactCustomerGetResponse->isSuccessful() && isset($contactCustomerGetResponse['customer'])) {
+                            $this->customerCorporateContact['id'] = $contactCustomerGetResponse['customer']['id'];
+                            $this->retailcrm->customersEdit($this->customerCorporateContact, 'id');
+                            $contactId = (int) $contactCustomerGetResponse['customer']['id'];
+                            $contactExternalId = $this->customerCorporateContact['externalId'];
+
+                            $contactCustomerCreated = true;
+                        } else {
+                            $contactCustomerCreateResponse = $this->retailcrm->customersCreate($this->customerCorporateContact);
+
+                            if ($contactCustomerCreateResponse->isSuccessful() && isset($contactCustomerCreateResponse['id'])) {
+                                $contactId = (int) $contactCustomerCreateResponse['id'];
+                                $contactExternalId = $this->customerCorporateContact['externalId'];
+                                $contactCustomerCreated = true;
+                            }
+                        }
+
+                        if ($contactCustomerCreated) {
+                            $contactPair = array(
+                                'isMain' => true,
+                                'customer' => array(
+                                    'id' => $contactId,
+                                    'externalId' => $contactExternalId,
+                                    'site' => $this->retailcrm->getSingleSiteForKey()
+                                )
+                            );
+
+                            // Update company in contact in company was obtained / created
+                            if (!empty($this->customerCorporateContact)
+                                && isset($this->customerCorporateCompany['id'])
+                            ) {
+                                $contactPair['companies'] = array(
+                                    array(
+                                        'company' => array(
+                                            'id' => $this->customerCorporateCompany['id']
+                                        )
+                                    )
+                                );
+                            }
+
+                            $this->retailcrm->customersCorporateContactsCreate(
+                                $customerData['id'],
+                                $contactPair,
+                                'id'
+                            );
+                        }
+                    } else {
+                        $this->customerCorporateContact['id'] = $customerData['mainCustomerContact']['customer']['id'];
+                        $this->retailcrm->customersEdit($this->customerCorporateContact, 'id');
+                        $contactId = (int) $this->customerCorporateContact['id'];
+                        $contactExternalId = $this->customerCorporateContact['externalId'];
+                    }
+                }
+
+                return new WC_Retailcrm_Customer_Corporate_Response(
+                    isset($this->customerCorporate['id']) ? $this->customerCorporate['id'] : 0,
+                    $this->customerCorporate['externalId'],
+                    $addressId,
+                    $companyId,
+                    $contactId,
+                    $contactExternalId
+                );
+            }
+
+            return null;
+        }
+
         /**
          * Process customer
          *
@@ -165,6 +521,68 @@ if (!class_exists('WC_Retailcrm_Customers')) :
             $this->customer = apply_filters('retailcrm_process_customer', $data_customer, $customer);
         }
 
+        /**
+         * Process corporate customer
+         *
+         * @param WC_Customer $customer
+         *
+         * @return void
+         */
+        protected function processCorporateCustomer($customer)
+        {
+            $createdAt = $customer->get_date_created();
+            $firstName = $customer->get_first_name();
+            $data_contact = array(
+                'createdAt' => $createdAt->date('Y-m-d H:i:s'),
+                'firstName' => $firstName ? $firstName : $customer->get_username(),
+                'lastName' => $customer->get_last_name(),
+                'email' => $customer->get_email(),
+                'address' => $this->customer_address->build($customer)->get_data()
+            );
+            $data_company = array(
+                'isMain' => true,
+                'name' => $customer->get_billing_company()
+            );
+            $data_customer = array(
+                'externalId' => $customer->get_id(),
+                'nickName' => $data_contact['firstName']
+            );
+
+            if ($customer->get_id() > 0) {
+                $data_contact['externalId'] = static::getContactPersonExternalId($customer->get_id());
+            }
+
+            if ($customer->get_billing_phone()) {
+                $data_contact['phones'][] = array(
+                   'number' => $customer->get_billing_phone()
+                );
+            }
+
+            $this->customerCorporate = apply_filters(
+                'retailcrm_process_customer_corporate',
+                $data_customer,
+                $customer
+            );
+            $this->customerCorporateContact = apply_filters(
+                'retailcrm_process_customer_corporate_contact',
+                $data_contact,
+                $customer
+            );
+            $this->customerCorporateAddress = apply_filters(
+                'retailcrm_process_customer_corporate_address',
+                array_merge(
+                    $data_contact['address'],
+                    array('isMain' => true)
+                ),
+                $customer
+            );
+            $this->customerCorporateCompany = apply_filters(
+                'retailcrm_process_customer_corporate_company',
+                $data_company,
+                $customer
+            );
+        }
+
         /**
          * @param array $filter
          *
@@ -195,6 +613,36 @@ if (!class_exists('WC_Retailcrm_Customers')) :
             return false;
         }
 
+        /**
+         * @param array $filter
+         *
+         * @return bool|array
+         */
+        public function searchCorporateCustomer($filter)
+        {
+            if (isset($filter['externalId'])) {
+                $search = $this->retailcrm->customersCorporateGet($filter['externalId']);
+            } elseif (isset($filter['email'])) {
+                $search = $this->retailcrm->customersCorporateList(array('email' => $filter['email']));
+            }
+
+            if ($search->isSuccessful()) {
+                if (isset($search['customersCorporate'])) {
+                    if (empty($search['customersCorporate'])) {
+                        return false;
+                    }
+
+                    $customer = reset($search['customersCorporate']);
+                } else {
+                    $customer = $search['customerCorporate'];
+                }
+
+                return $customer;
+            }
+
+            return false;
+        }
+
         /**
          * @param WC_Order $order
          *
@@ -234,5 +682,15 @@ if (!class_exists('WC_Retailcrm_Customers')) :
         {
             return $this->customer;
         }
+
+        public static function getContactPersonExternalId($wpCustomerId)
+        {
+            return 'wpcontact_' . $wpCustomerId;
+        }
+
+        public static function getCustomerIdFromContact($contactExternalId)
+        {
+            return str_ireplace('wpcontact_', '', $contactExternalId);
+        }
     }
 endif;
diff --git a/src/include/class-wc-retailcrm-orders.php b/src/include/class-wc-retailcrm-orders.php
index 992a44d..5cab0fe 100644
--- a/src/include/class-wc-retailcrm-orders.php
+++ b/src/include/class-wc-retailcrm-orders.php
@@ -115,49 +115,134 @@ if ( ! class_exists( 'WC_Retailcrm_Orders' ) ) :
         /**
          * Create order
          *
-         * @param $order_id
+         * @param      $order_id
+         *
+         * @param bool $forceRegularCustomer
          *
          * @return mixed
+         * @throws \Exception
          */
-        public function orderCreate($order_id)
+        public function orderCreate($order_id, $forceRegularCustomer = false)
         {
             if (!$this->retailcrm) {
                 return null;
             }
 
+            $isCorporateEnabled = $forceRegularCustomer ? false : WC_Retailcrm_Customers::isCorporateEnabledInApi($this->retailcrm);
             $wcOrder = wc_get_order($order_id);
             $this->processOrder($wcOrder);
             $wpUser = $wcOrder->get_user();
 
             if ($wpUser instanceof WP_User) {
                 $wpUserId = (int)$wpUser->get('ID');
-                $foundCustomer = $this->customers->searchCustomer(array(
-                    'externalId' => $wpUserId
-                ));
+                $wooCustomer = new WC_Customer($wpUserId);
 
-                if (empty($foundCustomer)) {
-                    $customerId = $this->customers->createCustomer($wpUserId);
+                if ($isCorporateEnabled && WC_Retailcrm_Customers::customerPossiblyCorporate($wooCustomer)) {
+                    $foundRegularCustomer = $this->customers->searchCustomer(array(
+                        'externalId' => $wpUserId
+                    ));
 
-                    if (!empty($customerId)) {
-                        $this->order['customer']['id'] = $customerId;
+                    // If regular customer was found - create order with it.
+                    if (!empty($foundRegularCustomer)) {
+                        return $this->orderCreate($order_id, true);
+                    }
+
+                    $foundCustomer = $this->customers->searchCorporateCustomer(array(
+                        'externalId' => $wpUserId
+                    ));
+
+                    if (empty($foundCustomer)) {
+                        $customerData = $this->customers->createCorporateCustomer($wpUserId);
+
+                        if ($customerData instanceof WC_Retailcrm_Customer_Corporate_Response) {
+                            if (!empty($customerData->getId())) {
+                                $this->order['customer']['id'] = $customerData->getId();
+                            }
+
+                            if (!empty($customerData->getContactId())) {
+                                $this->order['contact']['id'] = $customerData->getContactId();
+                            }
+
+                            if (!empty($customerData->getContactExternalId())) {
+                                $this->order['contact']['externalId'] = $customerData->getContactExternalId();
+                            }
+                        }
+                    } else {
+                        $this->order['customer']['externalId'] = $foundCustomer['externalId'];
+
+                        if (isset($foundCustomer['mainCustomerContact']['customer']['id'])) {
+                            $this->order['contact']['id'] = $foundCustomer['mainCustomerContact']['customer']['id'];
+                        }
                     }
                 } else {
-                    $this->order['customer']['externalId'] = $foundCustomer['externalId'];
+                    $foundCustomer = $this->customers->searchCustomer(array(
+                        'externalId' => $wpUserId
+                    ));
+
+                    if (empty($foundCustomer)) {
+                        $customerId = $this->customers->createRegularCustomer($wpUserId);
+
+                        if (!empty($customerId)) {
+                            $this->order['customer']['id'] = $customerId;
+                        }
+                    } else {
+                        $this->order['customer']['externalId'] = $foundCustomer['externalId'];
+                    }
                 }
             } else {
-                $foundCustomer = $this->customers->searchCustomer(array(
-                    'email' => $wcOrder->get_billing_email()
-                ));
+                $wcCustomer = $this->customers->buildCustomerFromOrderData($wcOrder);
 
-                if (empty($foundCustomer)) {
-                    $wcCustomer = $this->customers->buildCustomerFromOrderData($wcOrder);
-                    $customerId = $this->customers->createCustomer($wcCustomer);
+                if ($isCorporateEnabled && WC_Retailcrm_Customers::customerPossiblyCorporate($wcCustomer)) {
+                    $foundRegularCustomer = $this->customers->searchCustomer(array(
+                        'email' => $wcOrder->get_billing_email()
+                    ));
 
-                    if (!empty($customerId)) {
-                        $this->order['customer']['id'] = $customerId;
+                    // If regular customer was found - create order with it.
+                    if (!empty($foundRegularCustomer)) {
+                        return $this->orderCreate($order_id, true);
+                    }
+
+                    $foundCustomer = $this->customers->searchCorporateCustomer(array(
+                        'email' => $wcOrder->get_billing_email()
+                    ));
+
+                    if (empty($foundCustomer)) {
+                        $customerData = $this->customers->createCorporateCustomer($wcCustomer);
+
+                        if ($customerData instanceof WC_Retailcrm_Customer_Corporate_Response) {
+                            if (!empty($customerData->getId())) {
+                                $this->order['customer']['id'] = $customerData->getId();
+                            }
+
+                            if (!empty($customerData->getContactId())) {
+                                $this->order['contact']['id'] = $customerData->getContactId();
+                            }
+
+                            if (!empty($customerData->getContactExternalId())) {
+                                $this->order['contact']['externalId'] = $customerData->getContactExternalId();
+                            }
+                        }
+                    } else {
+                        $this->order['customer']['externalId'] = $foundCustomer['externalId'];
+
+                        if (isset($foundCustomer['mainCustomerContact']['customer']['id'])) {
+                            $this->order['contact']['id'] = $foundCustomer['mainCustomerContact']['customer']['id'];
+                        }
                     }
                 } else {
-                    $this->order['customer']['externalId'] = $foundCustomer['externalId'];
+                    $foundCustomer = $this->customers->searchCustomer(array(
+                        'email' => $wcOrder->get_billing_email()
+                    ));
+
+                    if (empty($foundCustomer)) {
+                        $customerId = $this->customers->createRegularCustomer($wcCustomer);
+
+                        if (!empty($customerId)) {
+                            $this->order['customer']['id'] = $customerId;
+                        }
+                    } else {
+                        $this->order['customer']['externalId'] = $foundCustomer['externalId'];
+                    }
                 }
             }
 
diff --git a/src/include/customer/class-wc-retailcrm-customer-corporate-response.php b/src/include/customer/class-wc-retailcrm-customer-corporate-response.php
new file mode 100644
index 0000000..33b0585
--- /dev/null
+++ b/src/include/customer/class-wc-retailcrm-customer-corporate-response.php
@@ -0,0 +1,123 @@
+<?php
+/**
+ * PHP version 5.3
+ *
+ * @category Integration
+ * @author   RetailCRM <integration@retailcrm.ru>
+ * @license  http://retailcrm.ru Proprietary
+ * @link     http://retailcrm.ru
+ * @see      http://help.retailcrm.ru
+ */
+
+if (!class_exists('WC_Retailcrm_Customer_Corporate_Response')) :
+/**
+ * Class WC_Retailcrm_Customer_Corporate_Response
+ */
+class WC_Retailcrm_Customer_Corporate_Response
+{
+    /**
+     * @var int $corporateId
+     */
+    private $corporateId;
+
+    /**
+     * @var string $corporateExternalId
+     */
+    private $corporateExternalId;
+
+    /**
+     * @var int $addressId
+     */
+    private $addressId;
+
+    /**
+     * @var int $companyId
+     */
+    private $companyId;
+
+    /**
+     * @var int $contactId
+     */
+    private $contactId;
+
+    /**
+     * @var int $contactExternalId
+     */
+    private $contactExternalId;
+
+    /**
+     * WC_Retailcrm_Customer_Corporate_Response constructor.
+     *
+     * @param int    $corporateId
+     * @param string $corporateExternalId
+     * @param int    $addressId
+     * @param int    $companyId
+     * @param int    $contactId
+     * @param string $contactExternalId
+     */
+    public function __construct(
+        $corporateId,
+        $corporateExternalId,
+        $addressId,
+        $companyId,
+        $contactId,
+        $contactExternalId
+    ) {
+        $this->corporateId = $corporateId;
+        $this->corporateExternalId = $corporateExternalId;
+        $this->addressId = $addressId;
+        $this->companyId = $companyId;
+        $this->contactId = $contactId;
+        $this->contactExternalId = $contactExternalId;
+    }
+
+    /**
+     * @return int
+     */
+    public function getId()
+    {
+        return $this->corporateId;
+    }
+
+    /**
+     * @return string
+     */
+    public function getExternalId()
+    {
+        return $this->corporateExternalId;
+    }
+
+    /**
+     * @return int
+     */
+    public function getAddressId()
+    {
+        return $this->addressId;
+    }
+
+    /**
+     * @return int
+     */
+    public function getCompanyId()
+    {
+        return $this->companyId;
+    }
+
+    /**
+     * @return int
+     */
+    public function getContactId()
+    {
+        return $this->contactId;
+    }
+
+    /**
+     * @return int
+     */
+    public function getContactExternalId()
+    {
+        return $this->contactExternalId;
+    }
+}
+
+endif;
diff --git a/src/retailcrm.php b/src/retailcrm.php
index 49cb19a..3cfda64 100644
--- a/src/retailcrm.php
+++ b/src/retailcrm.php
@@ -47,6 +47,7 @@ if (!class_exists( 'WC_Integration_Retailcrm')) :
                 require_once(dirname(__FILE__ ) . '/include/order/class-wc-retailcrm-order-item.php');
                 require_once(dirname(__FILE__ ) . '/include/order/class-wc-retailcrm-order-address.php');
                 require_once(dirname(__FILE__ ) . '/include/customer/class-wc-retailcrm-customer-address.php');
+                require_once(dirname(__FILE__ ) . '/include/customer/class-wc-retailcrm-customer-corporate-response.php');
                 require_once(dirname(__FILE__ ) . '/include/class-wc-retailcrm-base.php');
                 require_once(dirname(__FILE__ ) . '/include/functions.php');
                 add_filter('woocommerce_integrations', array( $this, 'add_integration'));
diff --git a/tests/test-wc-retailcrm-customers.php b/tests/test-wc-retailcrm-customers.php
index 35c82c3..182cd86 100644
--- a/tests/test-wc-retailcrm-customers.php
+++ b/tests/test-wc-retailcrm-customers.php
@@ -80,7 +80,7 @@ class WC_Retailcrm_Customers_Test extends WC_Retailcrm_Test_Case_Helper
     public function test_create_customer($retailcrm)
     {
         $retailcrm_customer = $this->getRetailcrmCustomer($retailcrm);
-        $id = $retailcrm_customer->createCustomer($this->customer->get_id());
+        $id = $retailcrm_customer->createRegularCustomer($this->customer->get_id());
         $customer_send = $retailcrm_customer->getCustomer();
 
         if ($retailcrm) {
@@ -103,7 +103,7 @@ class WC_Retailcrm_Customers_Test extends WC_Retailcrm_Test_Case_Helper
     public function test_update_customer($retailcrm)
     {
         $retailcrm_customer = $this->getRetailcrmCustomer($retailcrm);
-        $customer = $retailcrm_customer->updateCustomer($this->customer->get_id());
+        $customer = $retailcrm_customer->updateRegularCustomer($this->customer->get_id());
         $customer_send = $retailcrm_customer->getCustomer();
 
         if ($retailcrm) {