At our company, we use Authorize.net. Auth.net has something called Address Verification System[1]. I think it just matches zip codes but I might be wrong. If

At our company, we use Authorize.net. Auth.net has something called Address Verification System[1]. I think it just matches zip codes but I might be wrong. If we get AVS check fails on billing address, we automatically reject the order. If AVS check passes but shipping address is different and based on some other criteria like order history, order amount; we have someone double check on the order. I think every merchant should implement these basic checks. Not sure if it is possible with Square but I would assume they do provide something similar. [1] http://en.wikipedia.org/wiki/Address_Verification_System http://en.wikipedia.org/wiki/Address_Verification_System