I got I-140 approved and also got EAD with EB2 category in April 2012. I need to change my employer but my employer did not give me my green card paper like I-140 approval copy, labor code etc. I have only receipt copy of I-140 and I-485. I heard about USCIS form G-884 (Returns of original documents) which use to get all green card documents from USCIS. I have following questions to ask you. Based on G-884, can I get my all green card documents from USCIS without knowing my employer?
Form G-884 is used to request return of documents YOU had sent to USCIS (e.g., your college degrees and diplomas). Use FOIA for the purpose you are considering.