H1B - work experience letter required?

My H1B petition has been filed this time.

I was working in India with employer X and now I have left that job. My questions are as below:

  1. Will it require experience letter at any stage from that employer?

  2. May somebody ask / contact to that employer for the confirmation ?

  3. Do we need to pass through the same lottery system for extension visa after completion of 3 years?

Please reply soon…

Best,

Sachin

  1. May be required to ur employer to validate. Also there are chances of asking at the time of stamping

  2. Rare chances to verify by consulate during stamping. Also If U get a Govt. Project in US, they do background verification thoroughly

  3. Extension doesnt need any lottery