diff --git a/src/QUI/ERP/Payments/Amazon/Payment.php b/src/QUI/ERP/Payments/Amazon/Payment.php
index 3f599f26c370f18e91ded95ceb2f1f3fcf461055..02b57205a953005940d6c83fc881ad1e55327ea3 100644
--- a/src/QUI/ERP/Payments/Amazon/Payment.php
+++ b/src/QUI/ERP/Payments/Amazon/Payment.php
@@ -9,6 +9,7 @@ namespace QUI\ERP\Payments\Amazon;
 use AmazonPay\Client as AmazonPayClient;
 use AmazonPay\ResponseInterface;
 use QUI;
+use QUI\ERP\Accounting\Payments\Transactions\Transaction;
 use QUI\ERP\Order\AbstractOrder;
 use QUI\ERP\Order\Handler as OrderHandler;
 use QUI\ERP\Accounting\Payments\Gateway\Gateway;
@@ -194,9 +195,14 @@ class Payment extends QUI\ERP\Accounting\Payments\Api\AbstractPayment
      * Execute a refund
      *
      * @param QUI\ERP\Accounting\Payments\Transactions\Transaction $Transaction
+     * @param $amount
+     * @param string $message
      */
-    public function refund(QUI\ERP\Accounting\Payments\Transactions\Transaction $Transaction)
-    {
+    public function refund(
+        Transaction $Transaction,
+        $amount,
+        $message = ''
+    ) {
         // @todo
     }