Mo. Rev. Stat. § 52.200
The new collector shall execute receipts in triplicate, to be attested by the clerk of the county commission, for the tax book so delivered, and showing the amount already collected upon the same; also receipts in triplicate for the amount of taxes collected by his predecessor in office, from all sources, and paid over to him by the predecessor or his administrator or executor; one of each of the receipts shall be certified by the clerk to the director of revenue, who shall thereupon charge the new collector with the balance of the state taxes due on the tax book, and the amount paid over to him by his predecessor or the executor or administrator thereof; another shall be filed in the office of the clerk of the county commission, upon which to charge the new collector with the county revenue; and the third shall be given to the collector who resigned or was removed or to the executor or administrator of the deceased collector.
§ 52.200, RSMo