I think only MS can answer that question, that is why I mentioned you should call XBox. It would be quicker than waiting for someone who might have had the same problem to see this post and reply to it. But it's up to you.
Originally Posted by MIKEBEAST1234567
It used to just have an x next to each credit card that would delete them, but I don't see that now. Your best bet is to call Microsoft, have all the credit cards removed, then add the one you plan on using through the dashboard.
I called Xbox said that the credit card would not go through. The original problem with the credit card is the ATM wasn't working properly so we try'd too many times and the credit card was locked, but that's fixed now so i'm not sure what to do.