The Notice of Overpayment will include information on how to appeal. You must appeal the overpayment within 90 days of the date on the notice.If you were overpaid, you will receive a written notice in the mail. An overpayment of benefits can occur for a number of reasons. Knowing how they can occur can help you avoid such a circumstance. To apply for a refund, complete an. Applicafion for Refund of Ad Valorem Taxes (Form DR-462) and submit it to your county tax collector. The salary overpayment resulted because .