Your green card is not a permanent free pass — stay abroad too long and you could lose your US residency forever.

Add Yahoo as a preferred source to see more of our stories on Google. Currently, permanent residents who are outside Singapore without a valid re-entry permit lose their residency status. (PHOTO: ST ...

In a July column a reader who owns a green card asked about a long-term (more than one year) absence from the U.S., and how he could preserve his permanent resident status here during his time away.

Starting Dec. 1, Singapore Permanent Residents (PRs) who are outside of Singapore without a valid Re-Entry Permit (REP) will have 180 days to apply for one before losing their PR status. A valid REP ...