[punky]

I think the best way to do it is to get them to keep track of it, and you can check it by loging in via a web control panel. That way there is no argument. Otherwise, if they accuse you of going over (users don't account for overheads normally), and you don't think you did, then it can be easily proven otherwise. If I keep track of my downloads with DUMeter, if they accuse me of going over, and DUMeter doesn't show this, then they could accuse me of altering the stats manually. Of course, in a perfect world, we wouldn't be monitored and counted, but it isn't....