If you wish to transfer a domain from one company to another, you will need to go through several security procedures. One of them is obtaining a unique EPP authentication code from the current registrar company – provided that you are the domain registrant, since the code is sent to the domain owner’s mailbox and no one else can obtain it. You’ll need to provide this code to the new registrar, or else they will not be able to start the 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 and paste the correct code. As an additional protection measure, the transfer code for a domain may be altered on a regular basis. Certain domain name registrars refer to this code as a domain secret, a domain password or an Auth key as well.