Would it be a problem if he moves later? He's already 18 and has plans on moving out.
He'll have to change his address.
What would he need to do update his address?Does he have to communicate with DMV or send them some items to their office?
He'll have to go to a DMV office and provide  a completed Application for Duplicate Title PDF MV-902s a proof of identity and $ 20.00 for the replacement fee. Pretty much the same for replacing a title certificate.