If you decide to transfer a domain from one company to another, you’ll need to go through a few safety procedures. One of them is getting a special EPP authorization code from the present domain registrar – on the condition that you are the domain registrant, since the code is sent to the domain owner’s mailbox and nobody else can get it. You’ll need to provide this code to the new domain name registrar, or else they will not be able to initiate the domain name transfer. The EPP authentication codes are case-sensitive and may comprise of numbers or special characters such as dots or commas, which can be easily miswritten, so make sure you copy & paste the correct code. As an additional security measure, the transfer code for a domain may be altered regularly. Some domain name registrars call this code an Auth key, a domain password or a domain secret as well.