Pay Invoices
A subscriber can pay any open invoice in subscriber center. A subscriber can use a payment method on their account or use a single-use payment.
A subscriber can view all of their open invoices by click on the invoice icon.
If the subscriber has a payment method on the account, they can use the method on the invoice.
If a subscriber adds a new credit card, the card will save by default, but they can choose to not save the credit card record.