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. In this article, we'll provide tips on how to handle refund request letters and 7 sample templates you can use to get started today! This memorandum serves as notification of an overpayment of wages that you received and the subsequent repayment that is your responsibility. The salary overpayment resulted because . This form is for general instructions that apply to all corporation tax forms. It includes a variety of topics about how to fill out your form.