If you want to transfer a domain name from one registrar to another, you will need a unique domain authorization code, which may be called by various names – an EPP authentication code, an Auth code, a domain password, and so on. All these names refer to the very same thing – a code that the domain name owner receives from the present domain registrar and provides to the new one upon ordering. Without a valid code, a domain name transfer procedure cannot be initiated and this is one of the safety measures against unauthorized transfer attempts used with all gTLD and with most ccTLD extensions. For greater safety, the code comprises of digits and/or special symbols and is case-sensitive, so in case you wish to transfer one of your domains, you need to supply the new domain registrar with the right code.