Insurance companies find out about a DUI when they check your driving record before renewing or selling you a policy. If you have to file an SR-22, that will also alert your insurance company to the DUI. While the DMV does not inform insurance companies of a DUI directly, it’s always best to contact your insurer immediately about how to proceed. Otherwise, if your insurer decides not to renew your policy, you may find yourself scrambling to find new coverage before your insurance lapses.