N.D. Cent. Code § 28-24-07
If a sale of real estate is made under execution or upon mortgage foreclosure, the purchaser at the sale or the purchaser's successor in interest, in case of the expiration during the period of redemption of any insurance policy on the premises sold, may pay the premium necessary to procure a renewal of that policy, and, if any taxes or assessments become delinquent, or if any installment of interest or principal on any prior or superior mortgage becomes due during that period of redemption, and any utilities or other items to be paid by the purchaser in protection of the title or premises, the purchaser may pay those charges. The amount paid, with interest at the same rate as provided in the original instrument on which the judgment is based, is part of the sum necessary to be paid for the redemption from the sale. The payments must be proved by a written notice of additional lien verified by affidavit of the purchaser, the purchaser's agent or attorney, stating the items and describing the premises. That notice must be recorded in the office of the county recorder and a copy of the notice served on the sheriff of the county. After that service the sheriff shall collect the full amount specified in the notice in addition to the amount which would otherwise be due in redemption from the sale, and shall pay over that amount to the purchaser at the sale, or the purchaser's assignee. If the notice is not served on the sheriff and recorded within five days after payment, redemption may be made without paying those amounts.
N.D.C.C. § 28-24-07