to receive a po box at a local post office they are going to ask for two forms of valid i d pieces of identifications can include your driver s license passport insurance cards voters registration college i d and more some post offices may not have po boxes available po box short for post office box is a great way to receive mail outside of your home this box is locked within your local post office and is locked at all times
A US Passport Card, also called the PASS Card or, informally, the border card, is a credit-card-sized document that United States citizens can use instead of a regular passport for certain limited types of travel.
The U.S. Passport Card can be used to enter the United States from Canada, Mexico, the Caribbean, and Bermuda at land border crossings or sea ports-of-entry and is more convenient and less expensive than a passport book. The passport card cannot be used for international travel by air. I think its better to just get a passport. They are good for 10 years so its minimal investment. Also good advice, don't ever lose your passport overseas, keep it safe as its a pain in the ass and possibly a long process to get another one.