Mo. Rev. Stat. § 511.740: Submitting a controversy without action.

Parties to a question in difference, which might be the subject of a civil action, may, without action, agree upon a case containing the facts upon which the controversy depends, and present a submission of the same to any court which would have jurisdiction if an action had been brought; but it must appear, by affidavit, that the controversy is real and the proceedings in good faith, to determine the rights of the parties; the court shall thereupon hear and determine the case, and render judgment thereon, as if an action were depending.