first data provided go-tag (contactless and mobile payment technology) stickers to delegates and media representatives at the 2008 democratic national convention in denver, who used them to buy food and beverages. these stickers possessed nfc chips which were read by first data scanners, which through its back-end system deducted the purchase sum from the go-tag id's balance. first data also provided the trusted service manager that provisioned accounts to the new mobile google wallet system.