Transferring a domain from one registrar company to another generally involves the use of a unique domain name authorization code, which different companies call an EPP authorization code, a domain name password or an Auth code. This code can be used as a safety measure against unsanctioned transfers with all generic and with most country-code extensions. It can be obtained only by the owner of the given domain and is issued by the present domain name registrar company. It must be given to the new registrar because the transfer cannot be started without it. The code is case-sensitive and typically comprises of numbers and special symbols, so as to obstruct unauthenticated individuals from hijacking it. Some domain registrars even alter the codes of domains registered through them every once in a while for better safety.