How to Save a Payment Method
When submitting payment on a single PS-Invoice there will be a Save Payment Checkbox next to the Pay $ button.
Select the Save Payment Checkbox to re-use that payment method in the future.
After clicking the Pay $ button, PayPal will prompt you to fill out the necessary Credit Card payment information.
Complete PayPal’s Credit Card payment screen and click their orange Pay Now button to submit payment.
If you clicked the Save Payment Checkbox (earlier in the process), you will be prompted to Name and Save that payment for future use.
Name the payment something you will recognize and remember and click the green Save Payment button.