N.H. Rev. Stat. Ann. § 21-J:14-e

Every person, firm, or corporation making appraisals on behalf of a municipality for tax assessment purposes shall maintain records of its appraisal activities and shall make all such records available for inspection by the commissioner or authorized agents, upon request, at reasonable times during regular business hours. Any willful violation of the provisions of this section shall be subject to the penalties included in RSA 21-J:39.