If a person has a green card and enters the US (from the UK) after a 5 year absence, I have 2 questions: 1) What should they expect from immigration? 2) How can they continue to use the green card to travel in and out of the county in the future? (I'm concerned that they have been out of the county for too long)
Details:
Green card issued in the 80's (no expiration date)
Person files US taxes each year
Person maintains US bank accounts.
Person has family members that are US citizens.
They left the US due to the death of their spouse.
Thank you for your help.....

