N.H. Rev. Stat. § 21-G:14

I. For purposes of this section, legal proceeding includes, but is not limited to, any suit, action, incidental demand or action, claim, and any other matter filed or pending before any court, administrative agency, or other quasi-judicial body. II. For purposes of this section, document includes, but is not limited to, any petition, application, exception, motion, rule, answer, citation, notice, return, affidavit, certificate, oath, bond or other security, summons, subpoena, writ, interrogatory, deposition, inventory, appraisal, evidence, court record, instruction, verdict, judgment, order, injunction, confirmation, appointment, warrant, letter, and any other pleading or instrument whatsoever permitted or required in any legal proceeding. III. Any legal proceeding to which any agency which is abolished, whose powers, duties, functions, and responsibilities are transferred in accordance with the provisions of this chapter, is a party, and which is filed, initiated, or otherwise pending before any court on the effective date of such abolition and transfer, and all documents involved in or affected by such legal proceeding, shall retain their effectiveness and shall be continued in the name of the agency abolished. All further legal proceedings and documents in the continuation, disposition, and enforcement of such legal proceedings shall be in the name of the original party agency which is abolished; and the department to which the powers, duties, functions, and responsibilities of the agency are transferred shall be substituted for the original party agency without necessity for amendment of any document to substitute the name of the department or the name or title of any subdivision, official, employee, or other agent or representative of the department.