An overpayment scam, also known as a refund scam, is a type of confidence trick designed to prey upon victims' good faith. In the most basic form, an overpayment scam consists of a scammer claiming, falsely, to have sent a victim an excess amount of money. The scammer then attempts to convince the victim to return the difference between the sent amount and the intended amount. This scam can take a number of forms, including check overpayment scams and online refund scams.