If you were overpaid, you will receive a written notice in the mail. The salary overpayment resulted because .My former employer, the NYC Department of Education, kept paying me for three and a half months after I tendered my resignation. I wanted to reach out and see how others handle a situation where an employee was grossly overpaid wages. The first step you should take is to contact your former employee to advise that an overpayment has occurred and they are required to pay the money back. The Employee must fill out the ED Repayments Form (Appendix. We inform people about the fact and amount of the overpayment, their right to appeal, and the options to repay or, in some cases, receive waivers for the debt.