Over 500 million is lost each year to fake coupons. Papertale is the first nationwide, real-time coupon verification system for retailers.
Papertale maintains the organization www.fakecoupons.org where the story of how easy it is to use fake coupons is told.
Fake coupon use has grown over 2000% in the last 6 years. No retailer, including Walmart or Target has a solution in place to stop it.
Although there are hundreds of markets for document authentication the easiest to understand is finding fake coupons. Take a look at http://www.fakecoupons.org/examples/ to see how people walk out with gift cards, Playstations and anything with a barcode.