Disclosed is a method implemented in an identity document including a microcircuit and a unit enabling the microcircuit to communicate with a terminal, the microcircuit being designed to permit the transmission of data obtained (directly or indirectly) from data memorized in a storage zone in response to a request received from the terminal, furthermore including the following steps: reception by the microcircuit of an identifier of the terminal; at least partial comparison of the identifier of the terminal and of at least one portion of an identifier stored in the microcircuit; and performance of a set action depending on the result of the comparison. An identity document in which such a method is implemented is also described.