H1 Transfer Queries - When to quit current employer?

reapit

Registered Users (C)
Hi, I am currently on H1 with company A. I want to join company B and the same has applied H1 transfer (premuim). I need help to understand when should I join B or give notice to my current employer A (2 weeks notice required) given the following scenarios

1) On receipt of H1 transfer application receipt from USCIS, i give notice to my current employer. An RFE is issued to the H1 transfer application within the 2 weeks when I am still with employer A and serving notice period - can i still join company B and work legally while B is processing or has submitted response on the RFE?

2) Based on receipt of H1 transfer application receipt from USCIS, i join company B. An RFE is issued to the H1 transfer application after I have joined company B - can i continue to work legally (as far as the same is not denied) ?

3) Based on receipt of H1 transfer application receipt from USCIS, i join company B. The application is denied and company B plans to file an appeal. - can i continue to work legally for the period the denial notice was received, appeal submitted and decision made and communicated?

Please advise. Thanks in advance!
 
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