On the web, there are two steps to the purchasing process:
1. Authorization: Occurs when you enter your credit card number on the payment page and ensures that funds are available for purchase. At this point, no charges are made.
2. Charge: Occurs when you click Confirm payment at the end of the checkout process. Charges are applied.
On the PNP mobile app this process is handled by iTunes (for Apple devices) or Google Play (for Android devices) respectively.