Abstract: A cardless point-of-sale payment method capable of completing patient transactions when a connection to a wireless network is not available is provided, including verifying a personal identification number (PIN) provided to an application installed on a registered mobile internet device, retrieving a backup authorization token from a memory of the registered mobile internet device, displaying the backup authorization token on the registered mobile internet device for entry to a point-of-sale device, providing sale transaction information to a purchase authorization processing company (APC) via a transmission between the point-of-sale device and the APC wherein the sale transaction information includes the backup authorization token and a sale transaction value, verifying the backup authorization token, verifying the sale transaction value against an approved transaction value associated with the backup authorization token, providing an approval to the point-of-sale device via a transmission between the APC an