A method, system, and associated identification device for identification of an entity, such as a passport for identification of national citizens. The identification device includes: a) a display for displaying a photo and other identification data relating to the entity; b) a wireless communication part operable to receive data queries and transmit data wirelessly. The wireless communication portion includes: i) an antenna operable at a low radio frequency not exceeding 1 megahertz; ii) a transceiver operatively connected to said antenna and operable to transmit and receive data at the aforesaid low radio frequency; iii) a data storage device operable to store data including identification data for identifying the entity; iv) a data processor operable to process data received from the transceiver and the data storage device and to send data to cause the transceiver to emit an identification signal based upon the identification data stored in the data storage device; and v) an energy source operable for activating said transceiver and said data processor. The energy source is selected from a rechargeable battery, a replaceable battery, a solar cell, a pair of electrical connectors connectable to a mating pair of connectors extending to a power supply, and a tag energization antenna operable to receive radio frequency energy from an ambient radio frequency field of a second radio frequency.