H1B Approved but not getting it stampped

Hi Expert

Need some clarification on below case

Currently I am in Singapore and my H1B got Approved on 20 Oct 2016 with Employer A.But due to some family issues cannot travel to US atleast for 2 to 3 years and m looking to change the employer to B.Now want to clarify.I am not getting it stamped.?

1)As i will leave employer A, can they revoke by approved petition?2)If yes then what is the impact on my h1 status,can i use the same petition for filing cap exempt for next 6 years with other employers?3)If yes do ineed to collect any docs or info from current employer (Reciept number i have)

Thanks

  1. Yes

  2. Yes

  3. You should have a copy of the approval notice. If not, at least know the receipt number.