N.C. Gen. Stat. § 161-29.1

All acts and duties heretofore performed by any and all assistant or deputy registers of deeds, who were appointed but who were not sworn into office or who were sworn into office after their duties commenced, shall be and the same are hereby validated, ratified, and confirmed to all intents and purposes as if performed by assistant or deputy registers of deeds who were theretofore formally appointed and sworn into office, as required by G.S. 161-6, or as required by any other provision of law.