But anyways GC's are mostly bought with Amex unless your talking about the ink cards.
For DDF members yes but for the rest not the case. Also if you can't handle this type of letter you might want to think twice.
Dear CV:
Thank you for your business.
This letter is regarding your XXXX account.
Your account has been closed to prevent further use. If you or any other authorized user(s) still have a card,
please cut it in half and return it to us.
This action has been taken because of a security investigation involving your account.
You will continue to receive a monthly billing statement until your balance is paid in full.
We now consider this investigation closed.
Sincerely,
Your Security Operations Service Team