How "IRON CLAD" is a REO "offer sheet"?

[Sam Leon]

Looking at a REO property and normally I am used to having to write up a FARBAR AS-IS contract plus a bunch of bank addendums that basically nullify 90% of what's said in the FARBAR contract.

But this time the bank wants nothing except an OFFER WORKSHEET. A basic one page offer sheet summarizing the amount offered, cash or lending, now many days inspection, earnest money deposit, additional deposit #days, buyer and agent contact info and that's it.

So how iron clad is such a work sheet? Is it legally binding?

Say I am offering 100K cash for property, does it give me any advantage if I offer more deposit say 50K instead of the usual 5% or so? I was told some buyers put in 100% deposit, serious?