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American Express is offering double points opportunity for its cardmembers. This offer lasts exactly one year from March15, 2008 to March 15, 2009. We have not heard the promotion from American Express for a while. I think this is a great chance for American Express cardmembers to earn bonus Membership Rewards Points.

The promotion can be found at American Express website. According to the website, American Express charge card members can double their own membership rewards points on gas and groceries until March 15th, 2010. There is a cap of $1000 per month for each cardmember.

Details: Use your American Express^® Charge Card for everyday needs, and you can get more of the things you want. Enroll now so you can start earning double Membership Rewards points on virtually every dollar you spend on gas and groceries (up to $1,000 each month) until March 15th, 2010. If you are registered to manage your account online, you may enter your User ID and Password below to sign in and enroll in this promotion. Or, you may enroll by calling the phone number listed below and entering the promotional code.

Eligible Cards: the American Express Card, the American Express Rewards Green Card, the American Express Preferred Rewards Green Card, the American Express Gold Card, the American Express Rewards Gold Card, the American Express Preferred Rewards Gold Card, the American Express Rewards Plus Gold Card, the Platinum Card^®, the Centurion^® Card.

Promotion code: 139150001 or you can call 800-794-1308 to enroll.