A method to forward a browser client is disclosed. The method comprises storing information at a payment service server. The information includes a return network address corresponding to a interface hosted by a merchant server. Next, the method performs the step of comparing the return network address that is included in the information to a reference return network address corresponding to the interface hosted by the merchant server and identifying whether the return network address matches the reference return network address. Finally, the method comprises forwarding the browser client to the interface hosted by the merchant server responsive to the identifying the match.