Transferring a domain from one company to another traditionally involves the use of a special transfer authorization code, which different companies call an EPP authentication code, a domain name password or an Auth code. This code can be used as a protection measure against unsanctioned transfer attempts with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain name owner and is issued by the present registrar. It must be given to the new domain registrar company because the transfer cannot be started without it. The code is case-sensitive and frequently includes numbers and special symbols, so as to impede unauthorized people from deciphering it. Certain domain name registrars even alter the codes of domains registered through them from time to time for even greater safety.