Mo. Rev. Stat. § 513.075: Execution against executors or administrators prohibited.

No execution shall issue upon any judgment or decree rendered against the testator or intestate in his lifetime, or against his executors or administrators after his death, which judgment or decree constitutes a demand against the estate of any testator or intestate, within the meaning of the statute respecting executors and administrators; but all such demands shall be classed and proceeded on in the court having probate jurisdiction, as required by said statute.