N.H. Rev. Stat. § 6:11-a

I. Any payment received by any state department or institution for a fee, license, or product which is returned to the state department or institution as uncollectable shall be returned to the sender and not deposited with the state treasurer. Whenever payment of any fee or for any other purpose is returned to any state department or institution as uncollectable, the department or institution may charge a fee of $25 or 5 percent of the face amount of the check, whichever is the greater, plus all protest and bank fees, in addition to the amount of the initial payment to the person presenting the payment to the department or institution to cover the costs of collection. II. A payment received by any state department or institution for a fee, license, or product shall be returned to the sender and not deposited with the state treasurer and any application received by a state department or institution may be returned to the sender under any of the following circumstances: (a) The amount of the payment is incorrect. (b) The application is required to be submitted with the payment of a fee and is not so submitted or is improperly or incorrectly submitted. (c) A license applicant has not complied with one or more statutory requirements entitling him to make such application. (d) The requested product is unavailable. III. The department or institution may charge a fee, if appropriate, of at least $25 plus all protest and bank fees, if any, to the person presenting an application or payment which is unacceptable to a state department or institution, as provided in paragraph II.