Follow How do I pay an invoice using a credit card? July 21, 2017 15:38 Help on ActivityHero Parents Parent Updating/Managing Your Account To pay using a credit card: 1. Open the invoice email Subject: "You have an invoice from..." 2. Click 3. Click 4. Click 5. Complete the form 6. Click at the bottom of the form to finish 0Comments Article is closed for comments.