And what will they do when I change my address to register a vehicle?
we also update the title certificate record   you do not need to request new DMV documents with your new address 2   updating your address for a traffic ticket does not update your address in other DMV records 3
and what should i do when i change my address?
You can write your new address on the back of your driver's license, non-driver ID card, or learner's permit, and on the front of the registration document, carefully draw lines through the old address. Do not write the new address on a certificate of title.