Mo. Rev. Stat. § 490.390: Copies evidence when original lost.

Copies of the record of such instruments, and of the certificates of acknowledgment or proof thereof, duly certified by the recorder of the county in which the same may have been recorded as aforesaid, when it shall be shown to the court, by oath or affidavit of the party wishing to use the same, or of anyone knowing the fact, that such instrument is lost, or not within the power of the party wishing to use the same, shall be received in evidence with like effect and on the same conditions as the original instrument.