There is no cost to inquire. State agencies must notify the Comptroller's office of any overpayment of compensation or debt to the state.Some states require written notice (email is generally fine) to the employee and the employee must agree in writing to the terms of repayment. If the Social Security Administration sent you a notice about an overpayment you owe, you can make a secure payment here. In order for an overpayment refund to be processed in a timely manner, please submit a completed form with all refund checks and supporting documentation. The Notice of Overpayment will tell you how much you were overpaid. It will tell you to send the money back in 30 days. How to fill out the Overpayment Refund Notification Form? 1. Download the Overpayment Refund Notification Form. 2.