N.C. Gen. Stat. § 47-107
Whenever any deed, deed of trust, conveyance or other instrument permitted by law to be registered in this State has been registered for a period of 21 years or more and a clerk of the superior court or a register of deeds has adjudged the certificate of the officer before whom the acknowledgment was taken to be in due form and correct and has ordered the instrument to be recorded, but the name of a grantor which appears in the body of the instrument and as a signer of the instrument has been omitted from the record of the certificate of the officer before whom the acknowledgment was taken, such deed, deed of trust, conveyance or other instrument shall be conclusively presumed to have been duly acknowledged, probated and recorded; provided this presumption shall not affect litigation instituted within 21 years after date of registration.
N.C. Gen. Stat. § 47-107