N.H. Rev. Stat. Ann. § 3:9-a

The state seal shall be the property of the state of New Hampshire. No person shall manufacture, sell, expose for sale, or have in possession for sale any article or substance, being an article of merchandise or receptacle of merchandise or article or thing for carrying or transporting merchandise, or sell, expose for sale, give away, or have in possession for sale or to give away or for any purpose any article or thing to advertise or promote services, upon which shall have been printed, painted, attached, or otherwise placed a representation or likeness of the state seal, provided, however, that upon application, the secretary of state may authorize the use of the state seal. Once such approval is given, such use shall be exempt from the provisions of this section until or unless such approval is revoked or suspended by the secretary of state.