If you decide to transfer a domain from one domain name registrar to another, you will need to pass through several security steps. One of them is getting a special EPP authorization code from the current domain name registrar – provided that you are the domain registrant, since the code is emailed to the domain owner’s email and nobody else can see it. You need to provide this code to the new registrar company, or else they will not be able to start the transfer. The EPP codes are case-sensitive and may comprise of numbers or special symbols such as dots or commas, which can be easily miswritten, so make sure you copy & paste the correct code. As an extra protection measure, the transfer authorization code for a domain may be altered regularly. Some registrars refer to this code as a domain password, a domain secret or an Auth key as well.