Mo. Rev. Stat. § 443.370
443.370 Penalty for overcharging.
443.370. Penalty for overcharging. — Any person taking a larger compensation for his services, as aforesaid, shall be liable to any party interested in such writing, instrument or deed, in a sum double the amount taken for such services, recoverable by a suit in a court of competent jurisdiction.
(RSMo 1939 § 3480) Prior revisions: 1929 § 3093; 1919 § 2252; 1909 § 2857