Mo. Rev. Stat. § 475.160

Any conservator, protectee, creditor or other person, including a person interested in expectancy, reversion or otherwise, who claims an interest in property which is claimed to be an asset of the estate of a protectee or which is claimed should be an asset of such an estate, may file a verified petition in any court having jurisdiction of such estate seeking determination of the title and right of possession thereto. The petition shall describe the property, if known, shall allege the nature of the interest of the petitioner and that title or possession of the property, or both, are being adversely withheld or claimed. The court shall proceed on such petition in accordance with the provisions of section 473.340.