In the Domain names section, select the relevant domain name in the drop-down list and click on the Manage button.
Click on the Manage Domain Locking link to unlock the domain name.
Click on the Unlock domain link.
Your domain name will now be unlocked, click on Back to Control Panel to continue.
Click on the Request Authorisation Code option.
The Authorisation/EPP code for your domain will be shown on the screen.