Remember that big disaster in 2013 where Xerox food stamp services messed up and folks ended up on “unlimited money” cards. Which caused a panic at Walmarts and food stamp folks stormed the stores to take advantage of the problem. Apparently Walmart was to redeem some of those costs and is now suing Xerox for the money.
http://www.courthousenews.com/2015/11/10/wal-mart-bills-xerox-for-huge-shopping-spree.htm