On April 2015 my new employer's petition filed for me was approved for software developer position in California. Unfortunately due to some reasons not related to me, I was never offered and the H-1B visa was never activated. I was told the visa will be eligible for activation through 2018 year. Now I found new potential employer in Chicago for software developer position.
Am I still eligible for H-1B transfer? I have a receipt number and I checked in USCIS, that my case is still on status Approved. I could try to request approval notice I-797 from my issued employer, but I am not sure if they will send it to me. Is this a risky transfer because I have never worked for my first issued company because they didn't hire me? Is there a chance to be denied for the new employer? Should I request the copy of I-129 form from USCIS or only the receipt number with some other proofs like mails, screenshots will be enough?
I appreciate very much your help!
Thank you very much in advance,