The notification is important.
You can have the sheriff office deliver, that will cost you a small sum.
See if you can add a letter letting him know where he can pick up his person items. I would suggest they be delivered to his parents.
Since he is or has been living with you, I suggest that you have all his personal items boxed, that way he can pick them up when he is out of jail. Make a detail list and have it on each box. Some states require an eviction notice, and that makes it difficult to remove him quickly. All he would have to say is that he does odd jobs around your place for room and board and that would make eviction more difficult.
Have this all accomplished before he is released from jail.
If he has a key to your home, I suggest that you change the locks or have them rekeyed.
