I'm really sick of it . Till now I've got 6 refunds from may and juin from clients who have already got their products , everything was perfect but they decided to ask for a refund. They opt for "non authorized transaction" so Paypal will give them the refund no matter what I do. I manage payement via DPD (digital product delivery) so once a client pays he gets an email with the download link. And I have records that the clients have already downloaded their copies but still paypal will always go with the buyer side. Really sick of it.