Embodiments of the invention provide a method of processing payment authorization requests for payment transactions to be conducted via a data communications network on behalf of online merchants, the payment authorization requests are conducted as a result of orders by financial instrument holders via a plurality of different online merchant systems. In said message generation device, a message is created comprising a definition of the graphic information to be displayed in the field and a definition of updating said graphic information automatically to said field. The light attachment has a retracted, closed position, and a deployed, open position.