Mo. Rev. Stat. § 517.131
Current with changes from the 2023 Legislative Session
A default judgment may be entered in favor of a party filing a claim upon appearance by such party in person or by attorney upon written oath made by such party or upon such evidence as may be determined by the judge when the opposing party has been duly and timely served with summons and does not appear in court on the return date or subsequent date to which the case has been continued.
§ 517.131, RSMo