Abstract: A method and system include verifying credentials for gaining access to a transactional controller with the portable computing device. The transactional controller may receive a merchant identifier corresponding to a merchant and then it may compare the merchant identifier against loyalty account data stored in a database. The transactional controller may also receive product scan data and compare the product scan data against one of offer data and coupon data in a database. After these comparisons, any matches of product scan data to offer data or coupon data may be sent to the PCD and the POS controller. Similarly, any matches of the merchant identifier to loyalty account data may be transmitted to the POS controller. During or after the purchase transaction, a message may be generated by the transaction controller which lists one or more preferred payment options that may be selected using the PCD to complete a purchase.