Q. I cannot find my address by entering the postcode in the address field Enter your postcode and address directly in the address field. Related articles Q. What is the environment of PCs and smartphones for using the Yu ID? Q. Do I have to fill in the items, such as the landline phone number, that is not marked [Mandatory] on “Your profile registration” screen? Q. I pressed the URL included in the “Initial registration is complete” message but it resulted in an error Q. How do I register for Yu ID? Q. I registered for Yu ID, but I have not received the email necessary to complete the registration process