Mobile Coupons can be used with Foursquare and American Express has teamed up with them to offer a great deal check out this:
American Express® Cardmembers across the country can discover exclusive specials on foursquare. Connect any eligible Amex Card to your foursquare account today for couponless, hassle-free savings.
#1 – SYNC: Go to sync.americanexpress.com & securely connect your Card to foursquare to find exclusive Amex specials at foursquare venues.
#2 – UNLOCK: Once synced, check in to unlock specials & load them to your Card.
#3 – SAVE: To redeem, just use your Card. Savings will automatically appear on your statement.
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https://foursquare.com/americanexpress
