Can approved I-140 be revoked?

Question details

My current employer has filed for my greencard. My I-140 was approved last year. I have 2 more years on my H-1B. I want to change employers and want to know whether: My current employer can revoke my I-140 for changing companies? Even if they do so, can I maintain my Priority Date?

ANSWER

The old employer can withdraw I-140, but the applicant will still be able to retain the Priority Date.  Please review the latest information on this topic:  Priority Date Can Be Carried Forward Even if Old I-140 is Revoked (Unless Fraud or Misrepresentation) –July 7, 2012