Writing an effective "Inform a Customer of an Overpayment" letter can be challenging, especially if you're not sure where to start. For ACTIVE faculty, staff and students for an overpayment in the Current Calendar Year.An overpayment can happen if there is an ineligibility notice, which disqualifies a claimant in certain cases where they have already received benefits. Send a Dispute Letter to Your Card Company. Please download the form, complete each field and print. Include the form with your refund so we can properly apply the refund and record the receipt.