Wholesale - Risky ("pro forma")

Beth, I’ve never heard “pro forma” desrcibed as pre-payment. In my
limited experience in accounting methods, “pro forma” is an example,
a guideline, or a model for an eventual document (business plan,
balance sheet, statement, etc.). There may be such a use, but I’ve
never heard it. Tom

I've never heard "pro forma" desrcibed as pre-payment. 

Hi Tom, I did an “Ask Jeeves” and found this for “pro forma”:

1 : made or carried out in a perfunctory manner or as a formality

2 : provided in advance to prescribe form or describe items

I guess “provided in advanced” has come to apply not just to the
invoice but to payment as well, at least in the world of wholesale.