Mo. Rev. Stat. § 59.510
Whenever any deed or other instrument of writing, conveying or affecting real estate situate in two or more counties in this state, has been or shall be duly recorded in any one of said counties, or where any new county heretofore has been or may hereafter be erected and organized, and such real estate or any part thereof shall be situate within such newly organized county, and the deed or other instrument of writing conveying or affecting such real estate has been or may be duly recorded in the county or counties from which such newly organized county has been or shall be taken, any person interested therein may procure from the recorder of deeds of such county a duly certified copy of such record, with his seal of office thereto affixed, and cause such certified copy, together with the certificate thereof, to be recorded in any other county where such real estate may be situated, in the same manner as the original instrument is or may be by law required to be recorded.
§ 59.510, RSMo
RSMo 1939 § 13175