N.H. Rev. Stat. § 448-A:2
No lien shall be effective unless a written notice containing the name and address of the injured person, the date of the accident, the name and location of the hospital or home health care provider, and the name of the person or persons, firm or firms, corporation or corporations alleged to be liable to the injured party for the injuries received, shall be filed with the clerk of the town or city in which the hospital or home health care provider is located not later than 10 days after the patient has been discharged from the hospital or by the home health care provider and prior to the payment of any moneys to such injured person, his attorneys or legal representatives, as compensation for such injuries, nor unless the hospital or home health care provider shall mail by registered mail, return receipt requested, a copy of such notice with a statement of the date of filing thereof to (1) the person or persons, firm or firms, corporation or corporations alleged to be liable to the injured patient for the injuries sustained prior to the payment of any moneys to the injured person, his attorneys or legal representatives, as compensation for such injuries and (2) to any insurance carrier which has insured such person, firm or corporation against such liability. The person or persons, firm or firms, corporation or corporations alleged to be liable to the injured patient shall, upon request of the hospital or home health care provider, disclose the name of his or its insurance carrier which has insured such person, firm or corporation against such liability.
RSA 448-A:2
1955, 276:2. RSA 448-A:2. 1987, 123:3, eff. July 6, 1987.