North Carolina General Statutes Chapter 47. Probate and Registration § 47-5. When seal of officer necessary to probate

When proof or acknowledgment of the execution of any instrument by any maker of such instrument, whether a person or corporation, is had before any official authorized by law to take such proof and acknowledgment, and such official has an official seal, he shall set his official seal to his certificate. If the official before whom the instrument is proved or acknowledged has no official seal he shall certify under his hand, and his private seal shall not be essential. When the instrument is proved or acknowledged before the register of deeds of the county in which the instrument is to be registered, the official seal shall not be necessary.