H1b transfer - pay check requirements

Hi,

I received my H1b approved starting from 1st oct 2013. Before that I was on OPT + Capgap OPT till 30th SEP 2013.

Now (first week of Nov 2013) If I transfer my H1b to a new employer, how many pay checks I need to submit for H1b transfer petition?

  1. Is it only for the perion after 1st OCT when my H1b started?

Or

  1. I need to provide paychecks from past 3 months when I was on OPT?

Thanks a lot for time and efforts in advance.