N.C. Gen. Stat. § 1-339.27A
Upon motion of an interested person filed within 10 days after a sale or upset bid and for good cause, the judge or clerk having jurisdiction may order a resale of real property. If the motion is granted based on the inadequacy of the last bid, the procedure for the resale is the same in every respect as is provided by this Article in the case of an original public sale, and the last bidder is released from the bidder's obligations under the bid. If the motion is granted for any other reason, the last bid becomes the opening bid at resale, and if there is no bid at resale other than the last bid, the person who made the last bid is the highest bidder at resale. If the motion is denied, the 10-day period for subsequent upset bids begins upon the entry of the order.
N.C. Gen. Stat. § 1-339.27A