Mo. Rev. Stat. § 475.335
Any person indebted to a minor or disabled person or having possession of property or of an instrument evidencing a debt, stock, or chose in action belonging to a minor or disabled person may pay such debt or deliver such property or instrument to a conservator, curator, committee, guardian of the estate or other like fiduciary appointed by a court of the state of residence of the person, upon being presented with proof of his appointment and an affidavit made by him or on his behalf stating:
(RSMo 1939 § 416, A.L. 1955 p. 385 § 348, A.L. 1983 S.B. 44 & 45)
Prior revisions: 1929 § 416; 1919 § 412; 1909 § 442