RSA 478:1-a Recording of Plats.

I. No register of deeds shall file or record a plat of a subdivision, or a plat prepared for the purpose of showing existing property lines, if such plat has not been prepared and certified by a licensed land surveyor, since July 1, 1981, or by a registered land surveyor between January 1, 1970 and June 30, 1981, and any such filing or recording shall be void. For the purposes of this section the definition of the word "subdivision" shall be that contained in RSA 672:14. A "plat" for the purpose of this section shall be a map of a specific land area whose boundaries are defined by metes and bounds. A plat may show:
(a) Newly created parcels, streets, alleys, and easements as in a subdivision; or
(b) A lot-line-adjustment or site plan depicting existing parcels defined by