Missouri Revised Statutes Title XIX. Motor Vehicles, Watercraft and Aviation § 302.515. Notice of suspension or revocation by department--deemed received, when--contents

1. Upon receipt of the report of the law enforcement officer, the department shall make the determination described in section 302.505.  If the department determines that the person is subject to license suspension or revocation, and if notice of suspension or revocation has not already been served upon the person by the enforcement officer as required in section 302.520, the department shall issue a notice of suspension or revocation.

2. The notice of suspension or revocation shall be mailed to the person at the last known address shown on the department's records, and to the address provided by the enforcement officer's report if that address differs from the address of record.  The notice is deemed received three days after mailing, unless returned by postal authorities.

3. The notice of suspension or revocation shall clearly specify the reason and statutory grounds for the suspension or revocation, the effective date of the suspension or revocation, the right of the person to request a hearing, the procedure for requesting a hearing, and the date by which that request for a hearing must be made.