If you have registered for a tournament and cannot attend, it is very important to contact the organizer asap. Often, if the withdrawal is made early enough, a full or partial refund may be obtained. When you register and complete payment, the organizer takes it as a sign of your attendance and will pair your chess player into the tournament. Not showing up will leave your intended opponent sitting at the board – waiting. The same goes for leaving a tournament early.
At in person events, always notify the computer room before you leave an in person event.
If you wish to withdraw from an online event, you may X out of the event. Once you withdraw from an online event, you may not reenter.