N.C. Gen. Stat. § 47-12.2: Subscribing witness incompetent when grantee or beneficiary.

The execution of an instrument may not be proved for registration by a subscribing witness who, at the time of the execution of the instrument by the subscribing witness, is the grantee or beneficiary therein nor by proof of his signature as such subscribing witness. Nothing in this section invalidates the registration of any instrument registered prior to April 9, 1935. (1899, c. 235, s. 12; Rev., s. 997; C.S., s. 3303; 1935, c. 168; 1937, c. 7; 1945, c. 73, s. 11; 1947, c. 991, s. 1; 1949, c. 815, ss. 1, 2; 1951, c. 379, s. 1; 2013-204, s. 1.13.)