N.H. Rev. Stat. § 53-F:8
Collection of special assessments under this chapter shall be made by the tax collector or other official responsible for property tax or municipal service charge collection. A municipality shall commit bills for amounts due on the special assessments, including interest and any charges, to the tax collector with a warrant signed by the appropriate municipal officials requiring the tax collector to collect them. Each year bills for amounts due on the special assessments shall coincide with bills for property taxes or municipal service charges. Each special assessment imposed under a clean energy efficiency and clean energy district program pursuant to an assessment contract, including any interest on the assessment and any penalty, shall, upon recording of the assessment contract in the county in which the district area is located, constitute a lien against the property on which the assessment is imposed until the assessment, including any interest or penalty, is paid in full. The lien of the assessment contract shall run with the property until the assessment is paid in full and a satisfaction or release for the same has been recorded by the town, city, or district or its program administrator and shall have the same lien priority and status as other property tax and special assessment liens as provided in RSA 80. The town, city, or district, or any permitted assignee, shall have all rights and remedies in the case of default or delinquency in the payment of an assessment as it does with respect to delinquent property taxes and other delinquent special assessments as set forth in RSA 80, except that all prior recorded mortgages or liens shall retain priority over the lien of the assessment contract unless all such mortgagees or lienholders of record have consented to the lien as provided for in RSA 53-F:5.
RSA 53-F:8
2010, 215 : 2 . 2011, 68 : 6 , eff. July 15, 2011. 2014, 294 : 6 , eff. Sept. 30, 2014. 2015, 121 : 7 , eff. June 8, 2015.