If you decide to transfer a domain name from one registrar company to another, you will have to pass through several safety procedures. One of them is getting a unique EPP authorization code from the present domain registrar – on the condition that you are the domain registrant, since the code is emailed to the owner's email account and nobody 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 domain transfer process. The EPP authentication codes are case-sensitive and may include digits or special symbols such as commas or dots, which can be easily miswritten, so make sure you copy/paste the correct code. As an extra security measure, the transfer authorization code for a domain name may be altered regularly. Some domain name registrars call this code a domain secret, an Auth key or a domain password as well.