If you decide to transfer a domain name from one registrar to another, you’ll need to pass through a few safety procedures. One of them is getting a unique EPP authentication code from the current 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 will need to provide this code to the new registrar company, or else they won’t be able to begin the domain name transfer. The EPP authorization codes are case-sensitive and may include digits or special symbols such as commas or dots, which can be easily misentered, so make sure you copy & paste the correct code. As an extra protection measure, the transfer authorization code for a domain may be changed regularly. Some companies refer to this code as a domain password, a domain secret or an Auth key as well.