1. A method of assessing the risk of accepting a proffered payment, the method comprising: receiving location information from a point of sale device, wherein the point of sale device is associated with a merchant and configured to accept payments from customers of the merchant, and wherein the received location information is indicative of the location of the point of sale device; receiving financial information from the point of sale device indicative of the proffered payment; and evaluating the risk of the merchant accepting the proffered payment based at least in part on comparing the received location information to a plurality of approved locations at which payments can be accepted by the point of sale device and further based at least in part on the received financial information.