Mo. Rev. Stat. § 274.270
Any person, firm or corporation conducting a warehouse within this state who solicits or persuades or permits any member of any association organized hereunder to breach his marketing contract with the association by accepting or receiving such member's products for sale or for auction or for display for sale, contrary to the terms of any marketing agreement of which said person or any member of the said firm or any active officer or manager of the said corporation has knowledge or notice, shall be liable to the association aggrieved in a civil suit in the penal sum of five hundred dollars for each such offense; and such association shall be entitled to an injunction against such warehouseman to prevent further breaches and a multiplicity of actions thereon. In addition, said warehouseman shall pay to the association a reasonable attorney's fee and all costs involved in any such litigation or proceedings at law.
§ 274.270, RSMo