NOTICE OF FOOD STAMP OVERPAYMENT (DEMAND LETTER) (Timely and Adequate). NOTICE. Please call 1-800-772-1772 or your local field office and we may be able to process your waiver request quickly over the phone.Write a letter to the Social Security Administration. Tell them how much you can afford to pay each month. If the Social Security Administration sent you a notice about an overpayment you owe, you can make a secure payment here. We will use your answers on this form to decide if we can waive collection of the overpayment or change the amount you must pay us back each month. Below are helpful instructions on how to complete the Request for Waiver of Overpayment. Recovery or Change in Repayment Rate Form (SSA-632-BK).