Transferring a domain from one company to another typically entails the use of a unique transfer authorization code, which different registrar companies call an EPP authentication code, a domain name password or an Auth code. This code can be used as a security measure against unsanctioned transfers with all gTLD and with most ccTLD extensions. The code can be obtained only by the owner of the given domain name and is provided by the current registrar company. It must be given to the new registrar because the transfer procedure cannot be started without it. The code is case-sensitive and generally comprises of digits and special characters, so as to hinder unauthenticated individuals from deciphering it. Certain companies even alter the codes of domain names registered through them every once in a while for even better safety.