N.H. Rev. Stat. Ann. § 231:179

The notice of removal of any such pole shall designate the location in the highway to which the same shall be removed, and such notice, together with affidavit or acceptance of service thereof, shall be recorded in the office of the clerk of the city or town in which such pole is located. The notice shall take effect when the same, with such affidavit or acceptance of service endorsed thereon, shall be thus recorded, and the 10 days shall run from the date of such record.