If you are paying for your Funimation subscription with a credit card, you can update the current credit card or add a new credit card directly in Funimation.com.
- Log in
- Go to "My Account"
- Click "Subscription"
- Expand the "Billing Information" section
- Select the payment method marked as "Default Payment Method" and then click on "Edit"
- Make your changes and then click on "Save"
If you would like to add a different credit card, click on "Add a New Card", fill out the form, and save it. You can then mark this card as "Default Payment Method" to have that card charged for your subscription instead.