It is the responsibility of the DPR to notify and review the overpayment letter with the employee. • Log into INFORMS.In the Empl ID field, enter the Employee's 8-digit Numeric Identification Number. • In the Pay Period End Date field, enter the Pay Period End Date. This brief but important letter notifies a customer that he or she has overpaid you. It can serve as a very good customer relations letter. A detailed explanation of how the refund amount was computed;. • The specific reason(s) for the refund request;. Have you recently received a notice of overpayment from social security? As an FIU employee, you will encounter new ideas, cultures, languages, relationships, and opportunities.