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.Our document template is designed to make the process of writing an "Inform a Customer of an Overpayment" letter quick, easy, and stress-free. The salary overpayment resulted because . How is my refund calculated? When can I expect to receive my refund? The first step to get help with paying your fees and tuition is to submit an application for financial assistance. Payment shall be made retroactive after completing the first forty (40) consecutive hours worked in the higher classification. We have identified the following overpayment and are in good faith voluntarily refunding all monies collected in error.