N.C. Gen. Stat. § 45-21.40
In all cases where sales of real property have been made under powers of sale contained in mortgages or deeds of trust and such sales have been made within the times which would have been allowed by the statute of limitations for the commencement of actions to foreclose such mortgages or deeds of trust, and the execution and delivery of deeds in consummation of such sales have been delayed until after the expiration of the period which would have been allowed by the statute of limitations for the commencement of actions to foreclose such mortgages or deeds of trust as a result of the filing of raised or increased bids, such deeds in the exercise of the power of sale are hereby validated and are declared to have the same effect as if they had been executed and delivered within the period allowed by the statute of limitations for the commencement of actions to foreclose such mortgages or deeds of trust.
N.C. Gen. Stat. § 45-21.40