How does this work? The department of motor vehicles does not know who is providing the driver's insurance. I mean, it could be Allstate or Geico or Joe's Shoe Repair and Insurance Emporium. So how do they tell my insurance company that I have transgressed?

Here in CA the DMV asks for proof of insurance when renewing your car registration. The piece of paper I'm required to give them has all the information - insurance company, agent contact details, policy number, etc.

Borislav