to prevent chargebacks you implement a simple "I, (user), is purchasing XX amount from blah blah blah.. ending with I will record the transaction as well as the seller to reduce the risk of being scammed or preventing the seller with charegebacks blah blah blah" and you both simply record the transaction its simple lol. But if you research my account you can see ive purchased over 1100$ in the past month and over $3000 in my history with sythe. PayPal is a business with the proper records on both sides paypal transactions can be performed smoothly. You need to have strict and carefully instructions via paypal or you get chargebacks like it seems your having