N.H. Rev. Stat. § 21-J:3-a

I. The commissioner of the department of revenue administration may require a background investigation and a criminal history records check on any candidate for employment in a position in the department prior to a final offer of employment. The commissioner may request only a state records check or both a federal and state records check, to be conducted through the division of state police. The commissioner may extend a conditional offer of employment to a candidate, with a final offer of employment subject to a successfully completed criminal history records check. I-a. The commissioner of the department of revenue administration may require a background investigation and a criminal history records check on any current employee of the department for the purpose of determining that employee's suitability to access confidential tax information, including federal tax information. The commissioner may request only a state records check or both a federal and state records check, to be conducted through the division of state police. II. A candidate for employment in a position in the department or a current employee required by the commissioner to submit to a background investigation and a criminal history records check shall submit to the commissioner a criminal history records release form, as provided by the division of state police, which authorizes the release of the person's criminal records, if any. The candidate or employee shall submit with the release form a complete set of fingerprints taken by a qualified law enforcement agency, an authorized employee of the department of safety, or an authorized employee of the department of revenue administration, approved by the commissioner of the department of safety. In the event that the first set of fingerprints is invalid due to insufficient pattern and a second set of fingerprints is necessary in order to complete the criminal history records check, any conditional offer of employment shall remain in effect. If, after 2 attempts, a set of fingerprints is invalid due to insufficient pattern, the commissioner may, in lieu of the criminal history records check, accept police clearances from every city, town, or county where a candidate or employee has lived during the past 5 years. III. To obtain a state records check only, the commissioner or his or her designee shall submit a state criminal history records release form to the division of state police. To obtain both the federal and the state records check, the commissioner or his or her designee shall submit the criminal history records release form and applicant finger print card to the division of state police, which shall conduct a criminal history records check through its records and through the Federal Bureau of Investigation. Upon completion of the background investigation, the division of state police shall report any criminal conviction information to the commissioner or his or her designee. The commissioner or his or her designee may submit fingerprint information electronically, in accordance with procedures established by the division of state police. The department shall maintain the confidentiality and security of all criminal history records information received pursuant to this paragraph. IV. The commissioner may require the candidate or employee to pay the actual costs of the background investigation and the criminal history records check. V. For purposes of this section, the terms "candidate" and "employee" shall include any contractor, subcontractor, vendor, or other person performing work, including unpaid work or as a volunteer, at the department of revenue administration.