My father (Green card holder) is my petitioner and ('affidavit of support') sponsor joint with my older sister (US citizen). Now I am 23 years old, could my green card (F2A unmarried child under 21 years old) be revoked, if my father abandons his permanent residence?
If your father gained his legal permanent residency by lawful means and you gained your LPR by lawful means, what happens to your father's LPR after you gained yours should not have any adverse effect on yours.
You can review the specific facts with your attorney to find out your legal options if you have additional relevant facts that are not in your post.
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