Each account on each individual device has its own Support ID that helps the support team find your game account in the database if you need help. Therefore, we strongly recommend that you remember or write down your Support ID (you can take a screenshot).
Your Support ID matches your Invitation Code that you use to add friends. You can find your Support ID in the game settings by tapping the gear button next to the stars window.
Your Support ID can be found in your iOS device settings: Settings - Riddleside: Fading Legacy - Support ID.