N.H. Rev. Stat. Ann. § 204-C:39

In any suit, action or proceedings involving the validity or enforceability of any bond or note of the authority or the security for such bond or note, any such bond or note reciting in substance that it has been issued by the authority to aid in financing housing to provide dwelling accommodations for eligible persons and families shall be conclusively deemed to have been issued for housing of such character and said housing shall be conclusively deemed to have been planned, located and constructed in accordance with this chapter.