Mo. Rev. Stat. § 300.585: Uniform traffic ticket to be issued when vehicle illegally parked or stopped.

Whenever any motor vehicle without driver is found parked or stopped in violation of any of the restrictions imposed by ordinance of the city or by state law, the officer finding such vehicle shall take its registration number and may take any other information displayed on the vehicle which may identify its user, and shall conspicuously affix to such vehicle a uniform traffic ticket or other citation for the driver to answer to the charge against him within seven days during the hours and at a place specified in the traffic ticket.