If you have questions regarding paying your bill, payment plans, payment options, or anything else related to your Pima student account, we're here to help. 2) MAKE A COPY OF EACH CERTIFIED MAIL RECEIPT which you received back indicating.The salary overpayment resulted because . Contact the benefit payments office and ask them to place a hold on all collection activity regarding the overpayment until the appeal has been resolved. 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. Overpayments happen for various reasons. For example, DES may not budget your correct income or resources.