The Proof of Leadership is a medallion and treasure that belongs the the leader of the Addams Family. The current leader is Thomas Addams.
The Proof of Leadership is as its name states proves who is leader of the Addams Family and Addams Town. Thomas had to retrieve this medallion in order to become leader. Though the medallion is initially a circle shaped medallion it only becomes its real form, a diamond shaped, medallion when the Addams representative prove their worthiness to accept the role of leadership. Whoever, with exception of the leader, holds the medallion will be struck by lightning.