North Carolina General Statutes Chapter 146. State Lands § 146-63. Action by State to vacate grants

(1) When he has reason to believe that such letters patent were obtained by means of some fraudulent suggestion or concealment of a material fact, made by the person to whom the same were issued or made, or with his consent or knowledge; or

(2) When he has reason to believe that such letters patent were issued through mistake, or in ignorance of a material fact; or

(3) When he has reason to believe that the patentee, or those claiming under him, have done or omitted an act in violation of the terms and conditions on which the letters patent were granted, or have by any other means forfeited the interest acquired under the same.