Overpayments occur when you get benefits and we later find that you were not eligible. You need to pay back these benefits to us.What do I do if I receive an overpayment notice? I agree that I was overpaid unemployment benefits. Requests to appeal the overpayment must be submitted in writing to the department within 30 days of the overpayment notification. We hope it helps you resolve your overpayment as quickly as possible. 210 defines "overpayment" as a payment of salaries or wages for a pay period that is greater than the amount earned for a pay period.