In addition to validation during the authorization process, there is much you can do to train your employees to identify fraudulent transactions before even attempting to process them. Even with all the technological tools at your disposal, it is possible for an expert thief to beat them. So start with the premise that if something sounds fishy or too good to be true, it probably is—and you should think twice about accepting the order.
The following guides provided by Visa can help you put effective policies and procedures in place, and train your employees: