RSA 659:27 Challenge of Voter; Affidavit.

I. A voter offering to vote at any state election may be challenged by any other voter registered in the town or ward in which the election is held, an election official, a challenger appointed by a political committee pursuant to RSA 666:4, or a challenger appointed by the attorney general pursuant to RSA 666:5.
II. Upon receipt of a written challenge, the moderator shall determine if the challenge to the ballot is well grounded. If the moderator determines that it is more likely than not that the challenge is well grounded, the moderator shall not receive the vote of the person so challenged. If the moderator determines that the challenge is not well grounded, the moderator shall permit the voter to vote.