If you’ve ever had the unfortunate experience of forgetting your Amazon account password, or if you just want to get rid of a card that you no longer use, deleting it from your Amazon account is a quick and easy process. To delete a card from your Amazon account:

  1. Log in to your Amazon account.
  2. Click on the “Your Account” tab at the top of the page.
  3. Under “Your Account Details,” click on “Your Cards and Addresses.”
  4. On the “Cards and Addresses” page, under the heading for each card, click on the “Delete this Card” link next to the card you want to delete.
  5. Follow the instructions onscreen to confirm that you want to delete this card and then click on the “Delete Card” button to finish. ..

No, you cannot.

No. You can only change your payment method if the order is still in “Pending” status.