affiliates that allow incentive base how do you track

I just recently joined an affiliate that allows some incentive based ads and i want to ad an incentive to get people to sign up but do not know of a program or way i can track to prove they have signed up except with them taking a screenshot afterwards but that would be cumbersome... Any help is appreciated.

Thanks in advance

It all depends on the limits of the affilliate program's tracking system (and yours). I tag all users with a guid in my weblog table and pass that on to the fulfillment partner. They report back to me the details of all transactions with the associated user number (guid). Simple but effective.

i think that would be simple but doubt i could get all my affiliates to do that I was hoping for a way to do it like opening it in an iframe or frame where it reported back once they got to certain page or something....