I have a site that sells digital goods, but ofcourse its hard to stop people from scamming you right? , I usually just buy the postage label so paypal know I have posted the item, but surely theres a better way of doing this, Like digital tracking, how could I prove to paypal that my customer bought the item and downloaded it, is there anyway of agreeing in terms with paypal, also say if you set your own Terms and Conditions, could that be used against scammers? I wonder whether its worth setting up a download tracker, so I know if the customer has downloaded the item,