If your client is in your office or has provided you with their credit card information, you may use that information to make a payment to the Invoice.
To do this, navigate to the Invoice in question and click on the "Live View" button at the top right corner. This will allow you to view the Invoice as if you were the client (or allow your client to view the Invoice in person).
You'll then be able to select the "Pay Invoice" button and enter the credit card information to process payment.
KeyWords: payments, pay, invoices, credit card, debit card,