Transferring a domain name from one company to another commonly entails the use of a special transfer authorization code, which different registrar companies refer to as an EPP authorization code, a domain password or an Auth code. This code can be used as a security measure against unauthorized transfers with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain name owner and is provided by the present domain registrar company. It must be given to the new domain name registrar company because the transfer process cannot be initiated without it. The code is case-sensitive and normally includes numbers and special characters, so as to stop unauthenticated people from deciphering it. Some domain name registrars even alter the codes of domains registered through them after a certain amount of time for better security.