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