If you have a green card but expect to be outside the United States for an extended period of time, a Green Card Re-Entry Permit is definitely something worth learning about. Life can take you overseas for work, family matters, education, or other important reasons, and being away too long can sometimes create questions about your permanent resident status. Keep reading, and we’ll explain what a re-entry permit is, how it works, and when it might be a good idea to apply for one.