Patent ID: 7805378

Claim:
A payment system comprising: a transaction device system comprising: a transaction device associated with an account identifier, said account identifier including at least a first account identifier portion and a second account identifier portion, said transaction device further including a transaction device database including a proxy account identifier storage area operable for storing a proxy account identifier, said proxy account identifier including said first account identifier portion, said proxy account identifier storage area including a first proxy account identifier storage area and a second proxy account identifier storage area, said second proxy account identifier storage area configured to store at least said first account identifier portion, and said transaction device operable to provide said proxy account identifier including said first account identifier portion to an account identifier provider system; and said account identifier provider system in communication with said transaction device for receiving said proxy account identifier including said first account identifier portion, said account provider system operable to associate said first account identifier portion to said account identifier, said account identifier being associated with a transaction account, and said account identifier provider system operable to receive said first account identifier portion and provide the corresponding account identifier to an account identifier provider server for transaction completion.