RSA 260:50: Refund of Tolls Erroneously or Illegally Collected.

I. If the commissioner decides that any road tolls or interest or penalties have been erroneously or illegally collected from any distributor, the distributor shall be entitled to a refund thereof, or the amount may be deducted from any subsequent return.

II. No refunds or deductions shall be made under the provisions of this section unless a written statement, signed subject to prosecution for unsworn falsification, setting forth the circumstances shall be filed with the department within 4 years from the date of payment of road tolls illegally or erroneously collected. Errors in making a return may be corrected on any subsequent return with proper explanation.