Mo. Rev. Stat. § 57.408

Sheriffs in all counties, except counties having a charter form of government, or in any city not within a county, shall establish and make available an identification system for the identification of personal property. Anyone, upon application to a sheriff, shall be assigned an identification number to be composed of at least ten characters which will readily permit law enforcement officials of this state, in cooperation with officials in other states using interstate computerized law enforcement communication systems and other methods, to recover stolen property. The identification number should follow substantially the following form: