Mo. Rev. Stat. § 301.040

The director of revenue shall notify each registered motor vehicle owner by mail, at the last known address, within an appropriate period prior to the beginning of the registration period to which he has been assigned, of the date for reregistration. Such notice shall include an application blank for registration and shall specify the amount of license fees due and the registration period covered by such license. Application blanks shall also be furnished all branch offices of the department of revenue and license fee offices designated by the director of revenue under the provisions of section 136.055 where they shall be made available to any person upon request. Failure of the owner to receive such notice shall not relieve the owner of the requirement to register pursuant to this chapter.