Transferring a domain name from one company to another commonly entails the use of a unique domain name authorization code, which different companies call an EPP authentication code, a domain name password or an AuthInfo code. This code can be used as a protection mechanism against unsolicited transfers with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain registrant and is issued by the current registrar company. It must be given to the new registrar because the transfer procedure cannot be initiated without it. The code is case-sensitive and traditionally contains numbers and special characters, so as to obstruct unauthorized people from breaking it. Some registrars even change the codes of domain names registered through them from time to time for even greater security.