If you wish to transfer a domain from one registrar company to another, you’ll need to go through several safety steps. One of them is getting a unique EPP authorization code from the present registrar – on the condition that you are the domain registrant, since the code is emailed to the owner's email address and nobody else can get it. You need to provide this code to the new registrar company, otherwise they will not be able to start the transfer procedure. The EPP authentication codes are case-sensitive and may comprise of numbers or special symbols such as commas or dots, which can be easily mistyped, so make sure you copy and paste the right code. As an extra security measure, the transfer authorization code for a domain may be changed on a regular basis. Certain registrars call this code a domain secret, a domain password or an Auth key as well.