N.H. Rev. Stat. § 262:38
Notice of sale shall be given by posting notices thereof in 2 or more public places in the town or city where the property is stored, at least 14 days before the sale and, if the current retail value of the vehicle exceeds $1,000, as determined in good faith and by a credible method, by publishing the notice at least once in a newspaper of general circulation in the area. If the last place of abode of the owner of such vehicle is known to or may be ascertained by such garage owner or keeper by the exercise of reasonable diligence, a notice of the time and place of the sale shall be given by the garage owner by registered or certified mail, or in person, at least 14 days prior to the sale.
RSA 262:38
1931, 83:1. RL 121:7. RSA 266:7. 1981, 146:1; 361:1, 3. 2010, 344:8, eff. Sept. 18, 2010. 2017, 31:3, eff. May 9, 2017.