N.H. Rev. Stat. Ann. § 471-C:9

Except to the extent otherwise ordered by the court or administrative agency, any sum that a business association has been ordered to refund by a court or administrative agency which has remained unclaimed by the owner for more than one year after it became payable in accordance with the final determination or order providing for the refund, whether or not the final determination or order requires any person entitled to a refund to make a claim for it, is presumed abandoned.