Can I just write my new address in the back of my license if I haven't updated my address at the DMV?
No, by statute, you must update your address at the DMV whenever you move from your registered address. It's not enough to just write the new address in the back of your license, or inform an officer when getting a ticket, or tell the United States Postal Service.
How will you contact me about a problem with my insurance?
When we detect any problem with your insurance, we'll mail you an insurance inquiry letter to let you resolve the problem.