Mo. Rev. Stat. § 528.570

Every special commissioner, appointed under the provisions of this chapter before entering upon the discharge of the duties of his office, shall file with the clerk of the court in which the suit for partition is pending his bond, payable to the state, with such sureties as may be approved by the court, in a sum sufficient to indemnify the parties, conditioned that he will faithfully discharge the duties of his said office, and account for and pay over, according to the order of the court, to the parties entitled thereto, all such sums of money as may come to his possession as such commissioner.