N.C. Gen. Stat. § 45-21.20

A power of sale is terminated if, prior to the time fixed for a sale, or prior to the expiration of the time for submitting any upset bid after a sale or resale has been held, payment is made or tenderedof —

(1) The obligation secured by the mortgage or deed of trust, and

(2) The expenses incurred with respect to the sale or proposed sale, which in the case of a deed of trust also include compensation for the trustee’s services under the conditions set forth in G.S. 45-21.15.