In the midst of a PCS, you will have to consider what to do with your mail. Some of my military friends have forwarded their mail to family while they relocate. Another option is to discuss this with your sponsor and see if he or she can open up a post office box on base to forward your mail. If you have the luxury of visiting your new post ahead of time, you can bring your orders with you along with some identification to open up a post office box. This is a great option because you will have keys and your new address right away.