diff --git a/src/Common/Message/AbstractResponse.php b/src/Common/Message/AbstractResponse.php
index e958f4b2..95d5a833 100644
--- a/src/Common/Message/AbstractResponse.php
+++ b/src/Common/Message/AbstractResponse.php
@@ -146,6 +146,20 @@ public function getTransactionReference()
         return null;
     }
 
+    /**
+     * Gateway Card Reference
+     *
+     * @return null|string A reference sometimes provided by the gateway
+     * representing a tokenized or otherwise stored card.
+     *
+     * If this is returned it can be re-used in place of card details in
+     * subsequent transactions.
+     */
+    public function getCardReference()
+    {
+        return null;
+    }
+
     /**
      * Get the transaction ID as generated by the merchant website.
      *