Mo. Rev. Stat. § 442.280
Current with changes from the 2024 Legislative Session
No certificate of such proof shall be granted, unless such subscribing witness shall prove that the person whose name is subscribed thereto as a party is the person who executed the same; that such person executed the instrument, and that such witness subscribed his name as a witness thereof.
§ 442.280, RSMo
RSMo 1939 § 3419