Mo. Rev. Stat. § 50.360
Every such officer shall, at the end of each month, pay over to the county treasury all moneys collected by him from the above sources. He shall take two receipts therefor, and one of such receipts he shall file immediately with the county commission. He shall also, at the end of each month, make out an itemized and accurate list of fees, penalties, commissions, charges, emoluments, and moneys accruing in his office for services rendered, which have been collected by him, and one of all fees, penalties, commissions, charges, emoluments, and moneys accruing in his office for services rendered, which have not been collected, giving in both instances the name or names of the person or persons paying or owing the same, and stating, with reference to any money uncollected, that he has been unable, after the exercise of due diligence, to make collection thereof. The aforesaid itemized list shall be signed by the officer and verified by his affidavit, and filed with the county commission, and such officer shall be liable on his official bond for all money collected and not accounted for and paid into the county treasury as herein provided. It shall be the duty of the county commission to cause any money, shown by the officer's report to be due and unpaid, to be collected by law, and the same, when collected, to be paid into the county treasury.
§ 50.360, RSMo