Mo. Rev. Stat. § 245.170
The board of supervisors, except where otherwise provided, shall, by resolution, at time of hiring or appointing, provide for the compensation for work done and necessary expense incurred by any officer, engineer, attorney or other employee and shall also pay the fees, per diem and necessary expenses of all court and county officers who may by virtue of sections 245.010 to 245.280 render service to said district. It is understood that the ordinary fee statute does not apply to services rendered under sections 245.010 to 245.280 by any county officer, but each such officer shall receive only a reasonable compensation for services actually rendered, the same to be fixed by the court in which the proceeding is pending, except where otherwise provided in sections 245.010 to 245.280; that said corporations or petitioners for corporations may prepare, write or print all copies of petitions, writs, orders and decrees or other papers, and furnish same to the clerk or other officer for his use, and in such event said officer shall be entitled to receive as compensation for issuing the said writs and copies of petitions, decrees, orders or other papers, only the reasonable value of the services actually rendered.
§ 245.170, RSMo