A Domain (Transfer) Secret or Authorization (Auth) Code is a code assigned by the Registrar at the time the domain name was Registered. This Domain (Transfer) Secret acts like a password for a domain name, ensuring that only the owner of the domain can Transfer their domain name.
To Transfer any domain name, of any of the following TLDs (extensions), you would require to first obtain the Domain (Transfer) Secret or Auth. Code from your Current Registrar.
Ideally, your domain name's Domain (Transfer) Secret or Auth Code should be available within the Control Panel provided by your Registrar. In the event that you are not able to locate your Domain (Transfer) Secret or Auth Code, you need to contact the Support Team of your Current Registrar, to obtain the same.