Verification of rfid activation using activatable inlay

A radiofrequency (RF) tag, comprising;

• an antenna;
• an integrated circuit;
• an activation circuit connecting the integrated circuit to the antenna,
• wherein the integrated circuit is configured, responsive to the RF tag being interrogated by an interrogation signal in a predetermined radiofrequency range which is received by the antenna, to cause the antenna to emit a response signal when the activation circuit is closed but not emit a response signal when the activation circuit is open;
• an activation indicator component forming at least a portion of the activation circuit, the activation indicator component having a component conductive state and a component nonconductive state, such that the activation circuit is closed when the activation indicator component is in the component conductive state and the activation circuit is open when the activation indicator component is in the component nonconductive state;
• wherein the activation indicator component transitions from the component nonconductive state to the component conductive state responsive to an application of an activation action to the RF tag;
• an indicator circuit electrically connected to the integrated circuit;
• wherein when the indicator circuit is open, the response signal is a first distinct response signal, and when the indicator circuit is closed, the response signal is a second distinct response signal;
• and
• an activatable environmental exposure indicator coupled to the indicator circuit and having an indicator conductive state and an indicator nonconductive state, such that the indicator circuit is closed when the activatable environmental exposure indicator is in the indicator conductive state and the indicator circuit is open when the activatable environmental exposure indicator is in the indicator nonconductive state,
• wherein the activatable environmental exposure indicator becomes environmentally sensitive responsive to the activation action, such that when the RF tag is subsequently exposed to a predetermined environmental exposure, the activatable environmental exposure indicator transitions from a first of the indicator nonconductive state and the indicator conductive state to a second of the indicator nonconductive state and the indicator conductive state.