Here's what they're emailing out on clawbacks:
Information about your Membership Rewards account
We are writing to let you know that, after careful review of your Membership Rewards® account activity, we have removed points in your Membership Rewards program account. Please ensure that any Additional Card Members who are authorized to redeem points from your account are notified of this change in your Membership Rewards balance.
Why we are removing these points
We recently noticed point accrual and redemption activity on your
Membership Rewards program account that indicates an effort to obtain and use points in a manner that is not appropriate. It’s important for you to know that the
Membership Rewards program terms and conditions state that “if you attempt to use or obtain points in a fraudulent way, we may:
Take away all points in your program account,
Cancel your program account, or
Cancel any of your American Express Cards”
Your options
If you have any questions about this email, or if you believe that the points have been removed in error, please call us at 1-800-AXP-EARN (1-800-297-3276).
Thank you for your Card Membership.
American Express Customer Care