Benefits you received to which you were not entitled are known as overpayments. Request a payoff letter using the online Claimant Lien Payoff Request Form.If you cannot complete the online form, call 717-787-4621 for assistance. You must include your name, your SSN, and your mailing address. An (OSIG-189) should not be filled out for vendor overpayments. (1) The Office of the Comptroller will issue a cost settlement letter to the provider notifying the provider of the amount of the overpayment. You must fill out one overpayment request form per employee per pay period.