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.MEDI-CAL POTENTIAL OVERPAYMENT REPORTING WORKSHEET - PROPERTY. Included in this packet is a sample letter of the overpayment and the repayment options. Please review the information provided and select a repayment plan. Help protect yourself and your loved ones from fraud. Check out our tips and topics to learn about common scams and other consumer issues. When you are completing your application, you will need to add the school code for RCC. (FAFSA =001270, CADAA=00127000) so that we may receive your information.