Great info can be found here.
- If you are not an American Express Customer, opt out by calling 1-800-528-4800;
- If you are an American Express Card Member, opt out by logging into your American Express online accounts and adjusting your mailing preferences;
- If you are an American Express Consumer Travel customer, opt out by calling 1-888-485-0470;
- If you are an American Express Travelers Cheque and Prepaid Services customer, opt out by calling 1-800-722-8614;
- If you are Personal Savings from American Express customer, opt out by calling 1-800-446-6307.