Is it required for car registration?
I got a notice from the CA DMV once that I couldn't register until they had my insurance information. I'd just gotten new insurance and there was an issue where the VIN in the database was off by a single digit. My parents just got a new car and they were able to register it as a new vehicle, but they got a notice too. They were required to get insurance specific to the car within 30 days of purchase, and the letter stated that they had no insurance on file. I asked to see their insurance card and it was off by one letter and one digit and I helped call it in to their insurer to fix that and then mail a copy of the insurance card to the DMV.