Hello guys. I get packages delivered to me all the time, so I decided to give this online pickup a try. I opened a UPS account and printed two labels for rather large packages and scheduled pickup. I've printed both labels. When I opened my account, it didn't ask me for a credit card. It says my shipment has been processed and it says the shipping and pickup charges were charged to my shippers account. How does this work? Do I have to pay the UPS guy up front when he picks up the packages or do they send me a billing invoice after it's been delivered? My shipping charges for the two packages total over $250 Thanks.