My Alliance is participating in an Alliance War, but I cannot acquire contribution points, why?

You can only acquire contribution points during Alliance War if you have joined the Alliance at least 3 days prior to the event starting. If you joined the Alliance while the war is already underway you won't be able to contribute any points. However, be warned that while you cannot score points, you CAN surrender points to the enemy Alliance should they kill your Troops through attack on your Resource centers or your Castle.