Yeah just got the letter today as well. Located in socal. Went to the website as stated by the letter and after entering my info it shows that the liability insurance has been reported to DMV... No further action required.I got this letter. Took the first option on the letter and went to the website to try to resolve. When I got there, it said my insurance company had sent the paperwork and no more steps were needed.
Hopefully that's the end of this. Will post back if something comes up. Not sure if I should try to contact the DMV.