What is an Authorization ID or Domain Secret?
In order to transfer a domain name between registrants, the new or gaining registrar must supply a “password” along with the transfer request to the old or losing registrar. Registrants may have access to this information or may need to request it from their old registrar. These passwords are called the Authorization ID by some registrars and Domain Secrets by other registrars. This is not your password for accessing your registrar account in most cases.