If you wish to appeal a Discord punishment, you will need to provide your Discord User ID.
Your Discord User ID is an eighteen-digit number and is not the same as your username. You can find your User ID by following the steps below:
- On Discord, go to Settings > Advanced
- Scroll down and make sure that Developer Mode is on
- Exit your settings and type a message in any channel on any server
- Right-click your profile picture and click 'Copy ID', as seen below: