How do I delete a payment source?

Important Note:

Only after setting a new payment source default can you delete the old one. How do I change my customer's default payment source?

Steps:

1. Search customer whose payment source you want to delete. Click on customer's name.
2. Select the payment source you want to delete.4. Ensure you are deleting the right payment source so that you don't lose the one you need. Click "Delete". 

Success! You've now deleted the unwanted payment source.