User interaction should also be highly efficient, yielding transaction flows that keep completion time to a minimum. Solutions for the handling of any potential error condition is an integral part of achieving this efficiency.

Marchant Associates has worked with device developers in most parts of the world and have done much to promote interoperability standards for the user - both geographically and between device types and delivery channels.

We provide comprehensive services for user interface design for card accepting devices, covering card use in both physical and virtual worlds - banking machines, POS and UPOS terminals, land and mobile communications, PC internet and
interactive tv systems.

Our particular expertise is in payment products, multi-application chips and emergent technologies.