NOTICE OF FOOD STAMP OVERPAYMENT (DEMAND LETTER) (Timely and Adequate). NOTICE. A benefit overpayment is when you are given more money than you are entitled to.This may happen if we don't know your circumstances have changed. Welcome to the Office of the Suffolk County Comptroller. We are here to serve you in any way possible. Waiver applicants should be prepared to submit supporting documentation (e.g. An overpayment of benefits can occur for a number of reasons. Knowing how they can occur can help you avoid such a circumstance.