Mo. Rev. Stat. § 65.460
Every person elected or appointed to the office of township trustee and ex officio treasurer, before such person enters on the duties of his or her office, and within ten days after such person's election or appointment, shall execute and deliver to the township clerk a bond with one or more sureties, to the satisfaction of the township clerk payable to the township board, equal to one-half the largest amount on deposit at any one time during the year preceding his or her election or appointment of all the township funds, including school moneys, that may come into his or her hands; and every such bond, when deposited with the township clerk as aforesaid, shall constitute a lien upon all the real estate within the county belonging to such trustee and ex officio treasurer at the time of filing thereof, and shall continue to be a lien until its conditions, together with all costs and charges which may accrue by reason of any prosecution thereon, shall be satisfied.
§ 65.460, RSMo