N.H. Rev. Stat. § 339-A:4
No person shall be subject to the penalties of RSA 339-A:7 for having violated paragraph I of RSA 339-A:1, if the receipt, delivery, or proffered delivery of a hazardous substance was made in good faith, unless he refuses to furnish on request of the commissioner or of an employee of the department of health and human services, the name and address of the person from whom he purchased or received such hazardous substance, and copies of all records, if any there be, pertaining to the delivery of the hazardous substance to him; or if he establishes a guarantee or undertaking signed by, and containing the name and address of, the person residing in the United States from whom he received in good faith the hazardous substance, to the effect that the hazardous substance is not in misbranded packages within the meaning of the terms of the chapter.
RSA 339-A:4
1965, 77:1. 1995, 310:181, 183, eff. Nov. 1, 1995.