N.C. Gen. Stat. § 47-100
In all cases where a deed or deeds dated prior to the first day of January, 1980, purporting to convey lands, have been registered in the office of the register of deeds of the county where the lands conveyed in said deed or deeds are located, prior to said first day of January, 1980, and the acknowledgments or proof of execution of such deed or deeds has been taken as to some of the grantors by an officer who was himself one of the grantors named in such deed or deeds, such defective execution, acknowledgment and proof of execution and probate of such deed or deeds thereon and the registration thereof as above described, shall be, and the same are hereby declared to be in all respects valid, and such deed or deeds shall be declared to be in all respects duly executed, probated and recorded to the same effect as if such officer taking such proof or acknowledgment of execution had not been named as a grantor therein, or in anywise interested therein.
N.C. Gen. Stat. § 47-100