If you decide to transfer a domain name from one registrar company to another, you will need to pass through a few safety steps. One of them is obtaining a special EPP authentication code from the current domain registrar – as long as you are the domain registrant, since the code is emailed to the owner's email address and nobody else can get it. You will have to provide this code to the new registrar company, otherwise they will not be able to start 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 right code. As an additional safety measure, the transfer authorization code for a domain may be changed regularly. Some registrar companies refer to this code as an Auth key, a domain secret or a domain password as well.