With all these modern dating rules, it's really hard to tell when someone is or isn't really into you . In the happy scenarios, you know when someone likes you because he or she actually told you that. In the not so happy scenarios, you're left wondering if something is. If you are 100% sure that the money is not for you, you can simply take their username and refund the amount to the same person. You can even leave a message in the “Issue” part and write: “Wrong User, here is the money back”. 2. Someone sent you money through a third party. Suppose you have a friend or acquaintance who owes you money.