N.H. Rev. Stat. Ann. § 656:22

The official state primary election ballots shall be prepared by the secretary of state and shall be delivered by the secretary of state to town and city clerks so that the ballots shall be received not later than the Tuesday immediately preceding the state primary election. Each town and city clerk, in the presence of at least one other legal voter, shall verify the contents of the ballot package as provided under RSA 656:20 and reseal the ballots for use on election day.