N.H. Rev. Stat. § 479:18-a
Notwithstanding the provisions of RSA 479:3 or any other provision of law, the terms of repayment of any real estate mortgage loan made to a veteran under the provisions of Title III of the Servicemen's Readjustment Act of 1944, as now or hereafter amended, may, by written agreement between the holder of the mortgage and the debtor, be extended, the rate of amortization changed, and the amount of any delinquent interest and other delinquent mortgage charges added to the principal, all in accordance with the current federal regulations governing the subject; and the mortgage indebtedness as thus recast or amended as to terms of repayment shall be as fully secured under the original mortgage deed and have the same priority as the original mortgage indebtedness.
RSA 479:18-a
1957, 219:1, eff. July 3, 1957.