Transferring a domain from one company to another commonly entails the use of a unique domain 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 mechanism against unauthorized transfers with all generic and with most country-code 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 cannot be started without it. The code is case-sensitive and frequently contains digits and special characters, so as to obstruct unauthorized individuals from hijacking it. Some domain name registrars even alter the codes of domain names registered through them after a certain interval of time for even greater safety.