Missouri Revised Statutes Title XXIX. Ownership and Conveyance of Property § 446.175. Land patent not issued by state, owner may acquire, requirements

(1) Proving, by affidavits or otherwise, to the satisfaction of the secretary of state, that he, or someone under whom he claims title, purchased the land for which the patent is sought from the state and that the state has been paid for such land; and

(2) Proving, by affidavits of two disinterested householders of the township in which the land for which a patent is sought is located, that he, and those under whom he claims title, have been in open, notorious, exclusive, continuous, adverse, and hostile possession of all of such land for the period of ten years immediately prior to the time of applying for a patent under this section, and that during such time no other person has ever set up or made any claim to such land, or any portion thereof, which is hostile or adverse to the title of the applicant and those under whom he claims title.