Mo. Rev. Stat. § 514.210
Current with changes from the 2023 Legislative Session
When any suit or proceeding, instituted in the name of the state or any county, on the relation or in behalf or for the use of any private person, and where a suit shall be commenced in the name of one person to the use of another, the person for whose use the action is brought shall be held liable to the payment of all costs. And in all such cases, as well where there is security for costs, or where the attorney is liable for the same, judgment for costs shall be rendered against the person for whose use the action is brought, the security or attorney, in like manner and to the same extent as if the suit or proceeding had been instituted in his own name.
§ 514.210, RSMo
RSMo 1939 § 1421