There isn’t a limit but we have found that people have more errors the more people they have to registered. We recommend that you register 5 people at a time and up to 16 sessions at a time per registrant. If you need to register more than 5 people at a time, register the first five, then log out with the Login/logout link in the bottom right corner (do not use the link in the top right corner) and log back in to register. This clears the system and reduces chances of errors. Please note it may take up to a couple of minutes to move from screen to screen with that much data.