N.H. Rev. Stat. Ann. § 395:29-a

Notwithstanding any provision of RSA 395:27, 28 or 29 to the contrary, any deposit account in any institution, the deposits of which are insured by the Federal Deposit Insurance Corporation, or any other agency or instrumentality of the United States of America, may not be reduced without the consent of the Federal Deposit Insurance Corporation or such other agency or instrumentality.