diff --git a/src/Drivers/Saman/Saman.php b/src/Drivers/Saman/Saman.php
index ea2f970..a5b8f73 100644
--- a/src/Drivers/Saman/Saman.php
+++ b/src/Drivers/Saman/Saman.php
@@ -86,7 +86,7 @@ public function purchase()
         $this->invoice->transactionId($response);
 
         // return the transaction's id
-        return $this->invoice->getTransactionId();
+        return $data['ResNum'];
     }
 
     /**