Transferring a domain from one registrar company to another normally involves the use of a special domain name authorization code, which different registrar companies refer to as an EPP authorization code, a domain name password or an Auth code. This code can be used as a protection measure against unsolicited transfers with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain name registrant and is provided by the present domain name registrar company. It must be given to the new domain name registrar company because the transfer cannot be initiated without it. The code is case-sensitive and traditionally contains numbers and special symbols, so as to stop unauthenticated people from guessing it. Some domain name registrars even reset the codes of domain names registered through them after a particular period of time for greater safety.