N.C. Gen. Stat. § 47-11
The grantee or other party to an instrument required or allowed by law to be registered may at his own expense obtain from the clerk of the superior court of the county in which the instrument is required to be registered a subpoena for any or all of the makers of or subscribing witnesses to such instrument, commanding such maker or subscribing witness to appear before such clerk at his office at a certain time to give evidence concerning the execution of the instrument. The subpoena shall be directed to the sheriff of the county in which the person upon whom it is to be served resides. If any person refuses to obey such subpoena he is liable to a fine of forty dollars ($40.00) or to be attached for contempt by the clerk, upon its being made to appear to the satisfaction of the clerk that such disobedience was intentional, under the same rules of law as are prescribed in the cases of other defaulting witnesses.
N.C. Gen. Stat. § 47-11