What happens if my employer withdraws my Green Card petition?

If employer withdraws Green Card petition:

• Before I-140 approved: Petition is terminated, must restart with new employer
• After I-140 approved: I-140 remains valid, but you may need new employer to continue
• If I-485 pending: May be able to use AC21 to change employers
• Priority date: May be preserved if I-140 was approved

What to do: Find new employer quickly, file new petition or use AC21, consult immigration attorney.