How do I appeal an overpayment? DES will send you a form letter called a Determination of Overpayment.This letter specifies the weeks and amount that DES alleges you were overpaid. Overpayments happen for various reasons. For example, DES may not budget your correct income or resources. If a student is determined to have completely withdrawn from Pima Community College, the financial aid office must process a Return of Title IV calculation. Be sent a letter to their Pima email address . The salary overpayment resulted because . Fill in your name, address and telephone number in the top area where indicated on the Order. 2.