If you purchased a course using your credit card, the information is saved for your next purchase. You can remove the card information anytime by following the steps below.
1. Click on your profile icon in the top right of any page in the GNS3 Academy
2. Click on the "Add/Change Credit Card" button.
3. Click on the "Remove Card" button and then refresh the page
After following these steps, your credit card information will be removed from your GNS3 Academy account.