Mo. Rev. Stat. § 443.090
In case any person desires to release any part of the property described in any security instrument recorded prior to January 1, 1986, by deed of release, he shall be permitted to do so by the recorder on presentation to the recorder of the notes or other obligations evidencing the principal of the debt secured thereby, or accounting for them by affidavits or otherwise as now or hereafter provided by law in the case of full release, and the recorder shall note the fact of the filing for record of such partial release on such notes or obligations in substantially the following form:
"See partial release dated | ________________________________________ | ||
_____________________ Recorder" | |||
and of the presentation of such notes or other obligations, or accounting therefor, on the deed of release prior to its recordation, but shall not cancel such notes or other obligations. Nothing in this section shall be construed as making it necessary for any trustee named in the security instrument to join in such partial deed of release.
§ 443.090, RSMo