Mo. Rev. Stat. § 483.660: Records of probate courts transferred.

All records belonging to a probate court on January 1, 1979, shall on January 2, 1979, become records of the circuit court; provided, however, said records shall remain under the general administrative and supervisory control of the judge of the probate division who shall be responsible for storing and safekeeping said records. The circuit clerk and the division clerk of the probate division of the circuit court are authorized to issue certified copies of such probate court records, and all courts of this state shall recognize such certified copies as if made by a clerk of the original court.