Patent ID: 8165965

Claim:
A transaction method between a client and a point-of-transaction (POT) apparatus, wherein said POT-apparatus is connected to a server via a telecommunication network, said method comprising: receiving, in the POT-apparatus, client data read from a memory of a portable identification element of the client, the identification element containing at least one processor configured for transmitting data via a contact-free interface and not through said telecommunication network to said POT-apparatus; linking, in the POT-apparatus, the client data, a POT-apparatus identification (POSID) and transaction-specific data into a transaction voucher, wherein said client data comprises at least one client identification (IDUI); transmitting a debit order from said POT-apparatus to said identification element of said client through said contact-free interface and not through said telecommunication network, said debit order including at least said transaction-specific data, the POT-apparatus identification (POSID) and said client identification (IDUI); verifying, by said identification element of said client, that said debit order correlates with said client identification (IDUI); upon successful verification, transmitting said transaction voucher to said server via said telecommunication network.