N.H. Rev. Stat. § 349:5
Every person, proprietorship, partnership, or association, as defined in RSA 349:1, engaged in the conduct of any business, enterprise, venture, or activity within the state of New Hampshire under a trade name, firm, or style shall, subject to the limitations hereinafter set forth, file in the office of the secretary of state a certificate signed by such person, proprietorship, or by the members of such partnership or association stating the name under which the business is to be conducted, the principal place of said business, and a brief description of the kind of business to be carried on with the names and addresses of the principal parties engaged therein. Said registration shall further state the date of organization of said business.
RSA 349:5
GS 106:1. GL 117:1. PS 121:1. 1919, 57:1. PL 155 :1. RL 186:1. RSA 349:1. 1955, 284:1 par. 5. 1987, 393:10. 2004, 248:61, eff. July 1, 2004.