You can pay your credit card with a checking or savings account as long as it was opened in the United States, and it belongs to you. The deposit account number and the bank's routing number is needed to process payments, and you can keep up to four payment accounts on file.

More information 

We're unable to accept payments from debit cards, prepaid cards, and gift cards. 

Balance transfers from loans, lines of credit, and credit cards may be accepted if they're from another financial institution. If you're considering using one of these accounts, please contact them for more information.