diff --git a/lib/RetailCrm/Client/ApiVersion5.php b/lib/RetailCrm/Client/ApiVersion5.php
index ea08891..bc1050b 100644
--- a/lib/RetailCrm/Client/ApiVersion5.php
+++ b/lib/RetailCrm/Client/ApiVersion5.php
@@ -57,4 +57,5 @@ class ApiVersion5 extends AbstractLoader
     use V5\Tasks;
     use V5\Telephony;
     use V5\Users;
+    use V5\IntegrationPayments;
 }
diff --git a/lib/RetailCrm/Methods/V5/IntegrationPayments.php b/lib/RetailCrm/Methods/V5/IntegrationPayments.php
new file mode 100644
index 0000000..32c4cec
--- /dev/null
+++ b/lib/RetailCrm/Methods/V5/IntegrationPayments.php
@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * PHP version 5.4
+ *
+ * Orders
+ *
+ * @category RetailCrm
+ * @package  RetailCrm
+ * @author   RetailCrm <integration@retailcrm.ru>
+ * @license  https://opensource.org/licenses/MIT MIT License
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion5
+ */
+
+namespace RetailCrm\Methods\V5;
+
+/**
+ * PHP version 5.4
+ *
+ * Orders class
+ *
+ * @category RetailCrm
+ * @package  RetailCrm
+ * @author   RetailCrm <integration@retailcrm.ru>
+ * @license  https://opensource.org/licenses/MIT MIT License
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion5
+ */
+trait IntegrationPayments
+{
+    /**
+     * Update Invoice
+     *
+     * @param array $updateInvoice
+     * @return \RetailCrm\Response\ApiResponse
+     */
+    public function paymentUpdateInvoice($updateInvoice)
+    {
+        if (!count($updateInvoice)) {
+            throw new \InvalidArgumentException(
+                'Parameters `updateInvoice` must contains a data'
+            );
+        }
+
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/payment/update-invoice',
+            'POST',
+            [
+                'updateInvoice' => json_encode($updateInvoice)
+            ]
+        );
+    }
+
+    /**
+     * Check Invoice
+     *
+     * @param array $check
+     * @return \RetailCrm\Response\ApiResponse
+     */
+    public function paymentCheckInvoice($check)
+    {
+        if (!count($check)) {
+            throw new \InvalidArgumentException(
+                'Parameters `check` must contains a data'
+            );
+        }
+
+        /* @noinspection PhpUndefinedMethodInspection */
+        return $this->client->makeRequest(
+            '/payment/check',
+            'POST',
+            [
+                'check' => json_encode($check)
+            ]
+        );
+    }
+}