Some Travel Concerns for the Permanent Resident.
If you have a green card (i.e. a Lawful Permanent Residence Card), it is important to be aware of some issues that may arise as a result of traveling outside the United States. A person with a green card is free to travel outside the U.S., although a passport from their country of citizenship is generally necessary. When you return to the U.S. you usually simply show your green card at the time of re-entry. However, if you are going to be outside the United States for more than one year, but less than two years, you will want to obtain a “reentry permit.” Be aware that if you are outside the U.S. for more than 180 days (about 6 months) and attempt to re-enter, you may be deemed to have abandoned or relinquished your status.