If you decide to transfer a domain from one registrar to another, you will need to pass through several safety steps. One of them is obtaining a special EPP authorization code from the present domain name registrar – provided that you are the registrant, since the code is sent to the owner's mailbox and nobody else can get it. You have to give this code to the new registrar, or else they will not be able to begin the domain name transfer process. The EPP authentication codes are case-sensitive and may contain digits or special symbols such as dots or commas, which can be easily mistyped, so make sure you copy & paste the correct code. As an additional protection measure, the transfer code for a domain name may be changed on a regular basis. Some companies call this code a domain password, an Auth key or a domain secret as well.