Mo. Rev. Stat. § 47.350
The courts in which the accounts of any such personal representative or conservator remain to be settled, upon good cause shown, may transfer such accounts to the proper court of the county in which such personal representative or conservator resides; in which case the clerk of such court shall make out a transcript of the records and copies of accounts and papers touching such administration or conservatorship, and cause the same to be transmitted by some safe conveyance to the clerk of the court to which the accounts are to be transferred; and the clerk receiving such papers shall file the same in his office, and proceedings shall be had thereon in all things in the court to which the accounts are transferred, as if they had originated in such court; and the party applying for such removal shall pay all costs for making out such transcript and copies and transmitting the same, before the same shall be delivered to be transmitted.
§ 47.350, RSMo