When you purchase a membership or pay for an item using a payment plan, your payment method is securely saved in order to be charged in the future. If you would like to change this payment method on file, you can do so from the "Payment Methods" section on your account profile.
To access your User Account, go to https://app.offeringtree.com/me and sign in to your account. Your provider may also have a link directly on their website to allow you to log in and access your user dashboard.
Next, press the Payment Methods menu item in the navigation drawer. Then press the Edit button underneath your card information to edit your credit card information.