When I make a sale through my ArtFire store and the customer uses PayPal, PayPal notifies me of the payment. I then process the order and fulfill it. But it seems PP wants me to send an invoice and then create a shipping label. A little confused as to why I would send an invoice if they have already paid? Don't want to upset the customer by asking for payment when they have already paid. Do I have to create an invoice to create a shipping label? Must I do the shipping through PP or can I directly ship myself through USPS? Thanks so much.
