N.D. Cent. Code § 35-19-03
After satisfying the lien and any costs that may accrue, any residue remaining must be paid to the guest or boarder on demand. If a demand is not made within six months from the date of the sale, such residue must be deposited by the innkeeper, hotelkeeper, or tourist camp keeper with the treasurer of the county in which the inn, hotel, or tourist camp is situated, together with a statement of the innkeeper's claim and the cost of enforcing the same, a copy of the published notice, and a statement of the amounts received for the goods sold at said sale. The county treasurer shall credit the residue to the general revenue fund of the county subject to the right of the guest or boarder, or the guest's or boarder's representative, to reclaim it at any time within three years after the date of deposit thereof.
N.D.C.C. § 35-19-03