If I overpaid my customer twice the amount for a refund, does he have to return the overpaid amount?

If I overpaid my customer twice the amount for a refund, does he have to return the overpaid amount?

I told the customer I would refund $120 to his card. I asked my card processing company to do so. Three weeks later, the customer claimed that they still didn’t get the refund and threatened legal action against me if I didn’t refund the money within one day. I refunded them in cash and had them sign a paper to prove it. Now, a month later, my card processing company decided to refund the amount. Thus, the customer received twice the amount they were supposed to. If they keep the money, that is stealing. I need to find what my rights are here.

Asked on July 21, 2014 under Business Law, Texas

Answers:

IMPORTANT NOTICE: The Answer(s) provided above are for general information only. The attorney providing the answer was not serving as the attorney for the person submitting the question or in any attorney-client relationship with such person. Laws may vary from state to state, and sometimes change. Tiny variations in the facts, or a fact not set forth in a question, often can change a legal outcome or an attorney's conclusion. Although AttorneyPages.com has verified the attorney was admitted to practice law in at least one jurisdiction, he or she may not be authorized to practice law in the jurisdiction referred to in the question, nor is he or she necessarily experienced in the area of the law involved. Unlike the information in the Answer(s) above, upon which you should NOT rely, for personal advice you can rely upon we suggest you retain an attorney to represent you.