N.C. Gen. Stat. § 47-64
No acknowledgment or proof of execution, including privy examination of married women, of any deed, mortgage or deed of trust to which instrument a corporation is a party shall be held invalid by reason of the fact that the officer taking such acknowledgment, proof or privy examination was an officer, stockholder, or director in said corporation; but such proofs and acknowledgments and the registration thereof, if in all other respects valid, are declared to be valid. Nor shall the registration of any such instrument ordered to be registered be held invalid by reason of the fact that the clerk or deputy clerk ordering the registration was an officer, stockholder or director in any corporation which is a party to any such instrument.
N.C. Gen. Stat. § 47-64