Write a letter to the Social Security Administration. Tell them how much you can afford to pay each month.It's very important to deal with an overpayment notice right away. In this case, file a Request for Change in. This letter will state the amount of the overpayment, the reason it occurred, and an explanation of repayment options. An overpayment happens when the Social Security Administration (SSA) thinks it has paid you more than it should have. In Benefit Overpayment Services, you can make a payment, view past payments, and set up an installment agreement to make monthly payments.