Mo. Rev. Stat. § 511.580
Who may enter satisfaction.
511.580. Who may enter satisfaction. — Satisfaction may be entered by the plaintiff in person, by his attorney of record, or by his agent duly authorized, in writing, under the hand of the plaintiff.
(RSMo 1939 § 1287) Prior revisions: 1929 § 1122; 1919 § 1573; 1909 § 2142