Mo. Rev. Stat. § 490.510
Current with changes from the 2023 Legislative Session
Whenever it becomes necessary in any suit to prove an assignment of or an endorsement on any bond, bill or note, an affidavit of a competent witness, proving the same, shall be received as prima facie evidence of the facts stated in such affidavit.
§ 490.510, RSMo
RSMo 1939 § 1857