If you want to let another service partner or registrar manage your domain, you will have to provide a specific code (we call it Authorisation Code) to the new service partner / registrar. This code is very important for HKDNR (the registrar) to verify that you have authorised this company to manage your domain and that this new service partner can access to your registration and contact information of your domain. You can get the code by doing the below step: