Abstract: The invention provides a method and system allowing a consumer to update (secondary) payment credentials linked to a single set of main (first) payment credentials. This allows consumers to initiate transactions using such first set of payment credentials, which are treated by the merchant and acquirer as the payment credentials for the transaction, while the transaction is funded using payment credentials that the consumer dynamically selected. The selection may be performed before the transaction begins, or in some cases the selection can be made in real time whilst the transaction is ongoing.

Abstract: A null-amount payment account system transaction is performed in cooperation with a user payment device presented by a user. In response to successful completion of the transaction, a download of data is received regarding the user.

Abstract: A system and method for processing payment transactions made in the commerce using diverse payment device types. A centralized transaction processing platform is integrated with a standard payment-by-card industry network to process transactions made using different payment device types in the same manner as a conventional credit or debit card transaction. A single platform can provide a range of secure, flexible physical and virtual world payment solutions for all devices types including physical and virtual cards, RFID, mobile, etc.