document verification by Buffalo?

[zabaloch]

Hello experts,

I am trying to find out if the VO in Buffalo investigates each and every document you submit with your application? Any idea how is the verification done? Will the VO in Buffalo calling me or my family for verification? or the Bank for proof of funds? My college for degrees? My employer for experience? and so on so forth.
Any insight in this regard will be great.

Thanks .