Transferring a domain name from one company to another generally involves the use of a special authorization code, which different companies call an EPP authentication code, a domain password or an Auth-Info code. This code can be used as a safety 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 name 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 ordinarily contains numbers and special symbols, so as to impede unauthenticated people from breaking it. Some domain registrars even alter the codes of domain names registered through them after a particular interval of time for better safety.