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