Transferring a domain name from one registrar company to another traditionally entails the use of a unique domain name authorization code, which different registrar companies call an EPP authorization code, a domain password or an Auth code. This code can be used as a protection measure against unapproved transfers with all gTLD and with most ccTLD extensions. It can be obtained only by the domain registrant and is issued by the current 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 commonly comprises of digits and special characters, so as to prevent unauthorized people from breaking it. Some domain registrars even reset the codes of domain names registered through them after a certain period of time for even greater security.