When the person pays you and includes shipping, that money is in your paypal acct and when you print the label, it comes out of your paypal acct. For example if someone paid you $10 for shipping but the label only cost $5 you would still have the extra $5 in your paypal acct. If there's some new way of paying where the payer's $$ automatically goes to the shipper, I haven't heard of it. 100% of my labels show a transaction in which the shipping cost came out of my paypal balance.