As a seller. Because there's no way to confirm the buyer got the product, and they can claim they never got it and get your account limited? I'm talking about selling things individually, NOT like through Clickbank cuz I know PayPal and Clickbank are in bed together so it's safe... So my question is, if you want to sell eBooks, could you put the .pdf file on a CD and mail it? That way you'll have a shipping confirmation number. I hear that will protect PayPal sellers (and scammers have taken advantage of this by mailing boxes of rocks to their customers, and then when the customer complains, the seller says "ah-ah, check the shipping number, it was delivered" and PayPal sides with the seller).