Mo. Rev. Stat. § 507.110
Current with changes from the 2024 Legislative Session
Suits by infants may only be commenced and prosecuted, either: First, by a duly appointed guardian or conservator of such infant; or, second, by a next friend appointed for him in such suit; or, third, if asserted by counterclaim, by a guardian ad litem.
§ 507.110, RSMo