If you decide to transfer a domain name from one registrar to another, you’ll need to go through several security procedures. One of them is obtaining a special EPP authorization code from the present registrar – as long as you are the domain registrant, since the code is sent to the owner's email account and no one else can see it. You’ll need to give this code to the new registrar company, otherwise they will not be able to begin the transfer procedure. The EPP authentication codes are case-sensitive and may comprise of digits or special symbols such as commas or dots, which can be easily misentered, so make sure you copy & paste the right code. As an additional protection measure, the transfer authorization code for a domain may be changed on a regular basis. Certain domain name registrars refer to this code as an Auth key, a domain secret or a domain password as well.