Mo. Rev. Stat. § 51.280: County clerks, duties, compensation (certain first class counties).

In all first class counties not having a charter form of government, the clerk of the county commission shall prepare and issue all county licenses established by law, and collect the county fees therefor and remit the same to the county treasury, and he shall receive and retain no fees, compensation or emoluments of whatever nature for the performance of any official duty other than the compensation prescribed by section 51.281.