When you place your order with PayPal express checkout, we only authorize your PayPal account. When your order ships, we charge against that authorization. Unlike direct payments, however, when that authorization expires, there is no way for us to charge your order without customer intervention. PayPal authorizations usually expire about 29 days after the original order was placed. There is no way for us to extend the authorization window, and reauthorizations do not change the original authorization expiration date.