If you’d like to transfer a domain name from one registrar to another, you’ll have to pass through several security steps. One of them is obtaining a unique EPP authentication code from the current registrar company – on the condition that you are the registrant, since the code is sent to the owner's email account and nobody else can see it. You need to provide this code to the new registrar company, or else they will not be able to begin the transfer. The EPP authentication codes are case-sensitive and may include numbers or special symbols such as dots or commas, which can be easily miswritten, so make sure you copy and paste the right code. As an additional protection measure, the transfer code for a domain may be changed regularly. Certain domain name registrars refer to this code as an Auth key, a domain secret or a domain password as well.