N.H. Rev. Stat. Ann. § 471-C:7-a

Unclaimed property payable or distributable in the course of a demutualization, rehabilitation, or related reorganization of a mutual insurance company is presumed abandoned 2 years after the date of demutualization, unless the owner, during the 2 years following the date of demutualization, has communicated with the insurance company either in writing or through other communication which is evidenced by a contemporaneous record on file with the insurance company, concerning the demutualization proceeds.