Mo. Rev. Stat. § 474.400
Current with changes from the 2023 Legislative Session
No will in writing, except in the cases herein mentioned, nor any part thereof, shall be revoked, except by a subsequent will in writing, or by burning, cancelling, tearing or obliterating the same, by the testator, or in his presence, and by his consent and direction.
§ 474.400, RSMo
RSMo 1939 § 521, A.L. 1955 p. 385 § 269