N.H. Rev. Stat. § 7:24

The attorney general may investigate at any time charitable trusts, charitable solicitations, and charitable sales promotions for the purpose of determining and ascertaining whether they are administered in accordance with law and with the terms and purposes thereof. For the purposes of such investigation the attorney general may require any person, agent, trustee, fiduciary, beneficiary, institution, association, corporation, or political agency administering a trust, charitable solicitation, or charitable sales promotion or having an interest therein or knowledge thereof, to appear at such time and place as the attorney general may designate then and there under oath to produce for the use of the attorney general any and all books, memoranda, papers of whatever kind, documents of title or other evidence of assets or liabilities which may be in the ownership or possession or control of such person, agent, trustee, fiduciary, beneficiary, institution, association, corporation, or political agency and to furnish such other available information relating to said trust, charitable solicitation, or charitable sales promotion as the attorney general may require. Any person, agent, trustee, fiduciary, beneficiary, institution, association, corporation, or political agency administering a trust, charitable solicitation, or charitable sales promotion or having an interest therein or knowledge thereof, that is subject to an appearance by the attorney general has the right to have such appearance be in a physical location as determined by the office of the attorney general.