H1 Transfer Possibility ?

[sunilnair]

Hi,

I am on OPT and my H1 starts on 10/01/2012 with my present company A, I have a job offer from company B and they are willing to transfer my H1.

1. when can company B file for my H1 ? They advised me that they would be filing on OCT 1st with out any paystubs , is that possible ? as I will be starting my H1 with company A from OCT 1st.

2. Do i need my present company A's paystubs for transfer ? if so will my paystubs in OPT period be valued for the H1B transfer from company A to B?

Thank you,

Sunil