Mo. Rev. Stat. § 473.370: Establishment of claim by judgment — judgment deemed filed, when.

1. A person having a claim against an estate may establish the same by the judgment or decree of some court of record, in the ordinary course of proceeding, upon filing a copy of the judgment or decree in the probate division.

2. Except where notice of revival of an action or of institution of an action is filed as required by section 473.363 or 473.367, any judgment or decree is deemed filed within the meaning of section 473.360 as of the time a copy of the judgment or decree is filed in the probate division as required by this section.