A method for identifying packages in transit, comprises the steps of providing on a support a transponder chip equipped with a memory unit containing data identifying the chip, means for reading the memory unit and means for receiving and transmitting data at radio frequency, affixing said support to one of the packages so as to associate the identification data with the package, and providing one or more remote control units capable of radio frequency communication with the transponder chip so as to receive the identification data and identify the package. The method also comprises the steps of providing, on the support, means for writing the memory units, detecting predefined parameters of the package, transmitting them to the transponder chip by means of the remote control units and entering them into the memory unit by means of the writing means. An identification device designed to operate using the aforementioned method is also described.