Please download the form, complete each field and print. Include the form with your refund so we can properly apply the refund and record the receipt.31A-26-301 Timely payment of claims. (1). We have identified the following overpayment and are in good faith voluntarily refunding all monies collected in error. Contact OPM at 202-606-1234 for further assistance. There are two types of health insurance plans: fully-insured and self-funded. When you receive an overpayment, call the insurance company to confirm that the extra money is a true overpayment. You can request a review, appeal a decision or file a complaint. Your healthcare benefits are personal and we understand protecting your rights. Adjustment Process for Overpayments​​ Via an overpayment letter, explaining the cause of the overpayment and requesting a refund.