N.C. Gen. Stat. § 66-272
To authenticate a document, the Secretary must compare the official's seal and signature on the document with a specimen of the official's seal and signature on file in the Department. If no specimen is on file in the Department, the Secretary must require that the document be authenticated by an official for whom the Department does have a specimen. The Secretary must also verify the official's authority to perform a particular act when the law of a foreign jurisdiction requires it to be verified before it will recognize the authenticity of the document. When the Secretary is able to authenticate the official's seal, signature, position, and authority, the Secretary shall sign and issue a certificate of authentication. The certificate of authentication shall be appended to the document on a separate sheet.
N.C. Gen. Stat. § 66-272