The statute of limitations for Massachusetts is 1 year. We have identified the following overpayment and are in good faith voluntarily refunding all monies collected in error.In order for an overpayment refund to be processed in a timely manner, please submit a completed form with all refund checks and supporting documentation. When you receive an overpayment, call the insurance company to confirm that the extra money is a true overpayment. If the DUA says that you were overpaid, you can challenge their decision. You can also challenge the amount of the overpayment. Many times when a third-party payer mistakenly pays a dental provider, the payer will request a refund of the overpaid amount.