Do you need to refund a customer but don't know what to say? These email response templates will make the process easy and painless.Click the orange Refund button that will appear above the payment box. Over Payment Refund Letter To Customers Template. Overpayment response. Just call 555-5555 and our customer service representative will honor your request. Fill out the request for a refund letter addressed to the Orange County Superior Court on your company's letterhead. What happens if there is an overpayment on my account? We will promptly process the necessary paperwork for a refund.