Hi, a friend of mine is developing (has only just started) an affiiate script for himself, ad well as to potentially sell in the future. I had a quick look around a few of the major third party processor sites, and I could not find how exactly their payment notification system works.
I am assuming that they would all work similarly to paypal IPN system, as described here:
http://www.perl-studio.com/php/paypal/ but I can not find the exact info needed to help my friend out. Any help (links, or otherwise) would be appreciated.