N.C. Gen. Stat. § 43-27
Any person claiming any right, title, or interest in registered land adverse to the registered owner thereof, arising subsequent to the date of the original decree of registration, may, if no other provision is made for registering the same, file with the register of deeds of the county in which such decree was rendered or certificate of title thereon was issued, a verified statement in writing, setting forth fully the right, title, or interest so claimed, how or from whom it was acquired, and a reference to the number, book, and page of the certificate of title of the registered owner, together with a description of the land by metes and bounds, the adverse claimant's place of residence and his post-office address, and, if a nonresident, he shall designate or appoint the said register of deeds to receive all notices directed to or to be served upon such adverse claimant in connection with the claim by him made, and such statement shall be noted and filed by said register of deeds as an adverse claim; but no action or proceeding to enforce such adverse claim shall be maintained unless the same be commenced within six months of the filing of the statement thereof.
N.C. Gen. Stat. § 43-27