Q. [Expo ID Registration] An external account is already registered. A. Please enter your email address on the new registration page to register for Expo ID, or register for Expo ID using an external account with an email address set up. Related articles [Expo ID Registration] What is registration with an external account? [Expo ID Registration] What happens if I link to an external account? ［Admission Ticket］How can I register additional tickets? [Expo ID Registration] The process of linking with external accounts was canceled. ［Admission Ticket］Do family members or friends who receive the tickets also need to register for ExpoIDs?