A method of making a token, wherein the token includes a flat body made of a plastic material. The flat body has at least two parallel faces and a cavity which opens to at least one of the at least two parallel faces. The cavity receives an electronic identification device. At least one plug made of a plastic material is included. The plug is inserted into the cavity to retain the electronic device. The electronic device is in the form a pellet having outer film layers enveloping the electronic elements. The film layers are perforated. The method includes making the flat body, forming the cavity in the flat body, placing the electronic identification device in the cavity, inserting the at least one plug in the cavity, and fixing the at least one plug to the flat body using compression and heat so that the plastic material of the plug flows through the pellet.