N.H. Rev. Stat. Ann. § 243:3
The corporate name shall be one that is not in use by any other corporation in the state; and it shall not be changed except by the legislature.
Source. 1883, 100:3. PS 156:3. PL 246:3. RL 296:3. RSA 367:3. 2024, 33:1, eff. July 1, 2024. RSA 243:3.