Abstract: A system and method for conducting payment transaction using a mobile device equipped with a NFC interrogator, comprising: creating a payer user account in a server and associating a payer mobile device with the payer user account; registering, by the server, a payee NFC identity tag; recording, by the server, a payment transaction and associating the payment transaction record to the payee NFC identity tag; interrogating the payee NFC identity tag by the payer mobile device; transmitting the acquired identifier of the payee NFC identity tag to the server; matching the received identifier to the associated payment transaction record; retrieving and sending to the payer mobile device the matched associated payment transaction information; displaying the payment transaction information in the payer mobile device for user confirmation; transmitting the confirmed information and the payer mobile device identification data to the server to complete the payment transaction.