N.C. Gen. Stat. § 161-9: Official seal.

The office of register of deeds for every county shall have and use an official seal or stamp, which shall be provided by the county commissioners. The official seal or stamp shall be round, and the size shall not exceed one and five-eighths inches in diameter. Contained thereon shall be the name of the register of deeds, the county and letters "N.C.," and the words "Register of Deeds." The ink used for the official stamp shall be of the reproducible type; provided, that any register of deeds using a nonconforming seal or stamp prior to July 1, 1969 may continue to use such seal or stamp. (1893, c. 119, s. 1; Rev., s. 2649; C.S., s. 3550; 1969, c. 1028.)