There is a difference between clearing the chat log inside the game interface and clearing the chat archive. If you want to clear it so that it doesn't come back, then you want to clear the chat archive (warning it will clear everything since campaign inception). <a href="https://wiki.roll20.net/Game_Management#Settings" rel="nofollow">https://wiki.roll20.net/Game_Management#Settings</a> This is found on the Game Management page for your campaign (same place you access Game Settings and the API).