Yes and no. Registering Players online is not mandatory for clubs. However, even if your league does not currently accept online player registrations via the Whole Game System (WGS) they may look to adopt the process in coming seasons and completing the Player Registration process for your club now will mean you won't have to do it again in the future. Also, registering your club players will help you to save administration time on other club management processes; such as team discipline.