Recently we required to add new credit card on Amazon Web Services, and remove the old one.
We had adding new card easily, and we started to search the delete action for the old one. On the main screen you cannot find the delete action, nor in the whole sections in the my account. After searching the web, we found the solution here.
Thanks for this forum thread: https://forums.aws.amazon.com/thread.jspa?threadID=32742.