A system is disclosed comprising a near field communication tag that is transformable from a first state to a second state. The system also comprises a server program stored on a non-transitory storage medium that, when executed by a server apparatus, receives a first tag report from a user device in response to the tag being tapped while being in the first state, sends a first response to the user device or to another user device in response to the first tag report being received, receives a second tag report from the user device in response to the tag being tapped while being in the second state, and sends a second response to the user device or to another user device in response to the second tag report being received.