An SR-22 is a certificate from a Missouri licensed insurance company certifying that you have purchased liability insurance that meets the State’s minimum required coverage limits.  The SR-22 provides proof to the Missouri Department of Revenue that you are insured.  If you cancel your insurance or the insurance company cancels your policy before your suspension period is over, the company must notify the DOR that the certificate is canceled.

You will have to file an SR-22 if you apply for limited driving privileges.  Talk to your Missouri DWI attorney about whether you will have to file an SR-22 for other reasons.