Mo. Rev. Stat. § 513.045

The clerk shall, before delivering any execution issued by the clerk, endorse thereon the debt, damages and costs, or damages and costs, to be recovered, and shall maintain in his office record, and enter therein an abstract of all executions issued out of his office, showing the date, the names of the parties, amount of debt, damages and costs, or damages and costs to what officer directed, when made returnable, the return, if any, and a reference to the location of the record wherein the judgment or decree whereon such execution issued is entered; and every such clerk shall, moreover, keep a regular index to such abstract of executions, indexed or arranged alphabetically, both by the name of the plaintiff and defendant therein.