Ten tips for curtailing online coupon fraud. Coupons can be loaded with a startling amount of data, including identification about the customer, Internet address, Facebook page information and even the search terms the customer used to find the coupon in the first place. Check out this link. http://www.nytimes.com/2010/04/17/business/media/17coupon.html?pagewanted=2&emc=eta1--
