If you want to transfer a domain from one registrar to another, you will have to pass through a couple of safety procedures. One of them is getting a unique EPP authentication code from the present domain name registrar – on the condition that you are the domain registrant, since the code is sent to the owner's mailbox and no one else can obtain it. You have to provide this code to the new registrar, or else they won’t be able to begin the domain transfer process. The EPP authorization codes are case-sensitive and may contain digits or special symbols such as commas or dots, which can be easily miswritten, so make sure you copy/paste the right code. As an additional safety measure, the transfer authorization code for a domain name may be changed on a regular basis. Certain companies refer to this code as an Auth key, a domain password or a domain secret as well.