A friend of mine came to US 5 years ago with tourist visa. She married an American. Got her 2 years conditional green card, then removed the conditional green card and finally she received her 10 years Green Card. After 5 years marriage, she decided to divorce her husband due to his drinking and drug problem. Her questions are:
1. Should she report to the INS office that she is recently divorced?
2. What happen to her status here in America? Can she be deported eventhough she has 10 years green card?
3. How do you extend a 10 yrs green card? Would INS ask her to come for interview or can she just fill out an appropriate form and mail it out to INS?
Thank you.

No need to apprise USCIS of the divorce, but she does need to file an AR-11 if she moves (likewise for her sponsor, an I-865, if he moves). On the USCIS website under FAQ she can find out how to renew the 10 year card, when it is time.

When your friend removed the condition from her green card the " condition " was the marriage. When that happened your friend became a permanent resident of the USA. Her presence was no longer based on her marriage.
Like diaddie mermaid said. the only thing she must do now is keep the USCIS posted with her whereabouts and file for renewals every 10 years. She should really consider becoming a citizen so that she doesn't have to bother with this, but that is a personal decision. Tell her not to worry. Her presence is no longer based on her marriage!!!