Mo. Rev. Stat. § 442.370
Current with changes from the 2024 Legislative Session
No such letter of attorney, or other instrument, certified and recorded in the manner prescribed in the preceding section, shall be deemed to be revoked by any act of the party by whom it was executed, until the instrument containing such revocation shall be deposited for record in the same office in which the instrument containing the power is recorded.
§ 442.370, RSMo
RSMo 1939 § 3434