If you wish to transfer a domain name from one domain name registrar to another, you will have to pass through a couple of security procedures. One of them is getting a unique EPP code from the current domain registrar – as long as you are the domain registrant, since the code is emailed to the owner's mailbox and no one else can see it. You will need to provide this code to the new domain name registrar, or else they will not be able to start the domain name transfer procedure. The EPP authorization codes are case-sensitive and may include digits or special characters such as commas or dots, which can be easily miswritten, so make sure you copy and paste the correct code. As an additional protection measure, the transfer code for a domain may be changed on a regular basis. Certain registrars refer to this code as an Auth key, a domain secret or a domain password as well.