You can save a credit card/ credit card for future payments on the Statement Page in the right-side block
There are 2 ways to save a credit card: while making a payment or without any payment being made. (FYI: in this case, the card will be saved but it becomes not possible for the system to validate the card, so there is no guarantee that all the data is correct, and the card will work for the next payment made. Adding a card while making a payment guarantees that the card which made a successful payment will work for future transactions unless it is expired)
Saving a card without making a payment
1. Choose the Credit Card option and then click on New Credit Card
2. You will be transferred to the next page for entering the billing address information
Enter the cards billing info
Enter the name of the card and click Continue
On the next page enter your Credit Card info and click Submit
Now your card is saved, and you can see it on the list. You can add as many cards as you need. 
Manage accounts
You can also click on Manage accounts and in a new pop up window click on New Credit card
If there are saved cards you can also delete them.
Saving a card while making a payment:
Check the invoices you want to make a payment for
Click on Pay in Invoices additional functionality panel
In the right-side block, you will see the total amount to pay
Please click on +New Credit Card
You will be transferred to the next page for entering the billing address information
Enter billing address information
Check the box Save payment account and enter a card name
Click Continue
On the next page enter your Credit Card info and click Submit
If you see the page Transaction Successful – the payment was made, and the card was saved. YAY! You can see it on the list on the statement page in the right-side block or in Manage accounts.
