Details and access of the wallet containing the indicated sum of btc will be shipped via courier service. when you receive this small envelope,it contain details log-in info's and the indicated amount of coin.
Hmm. Something seems odd. Why can't you send the account details via e-message? Why does it have to come by courier? Is this 'small envelope' going to arrive prior to you receiving PayPal funds? *scratches head*
because there are idiots who will do a chargeback if you don't have proof of delivery, this is the best way to cover from that.