N.H. Rev. Stat. § 651:5-b
Any person who was arrested or convicted for knowingly or purposely obtaining, purchasing, transporting, or possessing, actually or constructively, or having under his or her control, 3/4 of an ounce of marijuana or less where the offense occurred before September 16, 2017 may, at any time, petition the court in which the person was convicted or arrested to annul the arrest record, court record, or both. The petition shall state that the amount of marijuana was 3/4 of an ounce or less. The petitioner shall furnish a copy of the petition to the office of the prosecutor of the underlying offense. The prosecutor may object within 10 days of receiving a copy of the petition and request a hearing. If the prosecutor does not object within 10 days, the court shall grant the petition for annulment. If the prosecutor timely objects, the court shall hold a hearing. In a hearing on the petition for annulment, the prosecutor shall be required to prove beyond a reasonable doubt that the petitioner knowingly or purposely obtained, purchased, transported, or possessed, actually or constructively, or had under his or her control, marijuana in an amount exceeding 3/4 of an ounce. At the close of the hearing, the court shall grant the petition unless the prosecutor has proven that the amount of marijuana exceeded 3/4 of an ounce. If the petition is granted, and an order of annulment is entered, the provisions of RSA 651:5I, X-X shall apply to the petitioner.
RSA 651:5-b
2019, 211 : 1 , eff. Jan. 1, 2020.