Transferring a domain from one registrar company to another usually involves the use of a special transfer 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 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 issued by the present registrar. It must be given to the new domain registrar company because the transfer procedure cannot be initiated without it. The code is case-sensitive and often contains digits and special symbols, so as to stop unauthorized persons from deciphering it. Some domain name registrars even reset the codes of domains registered through them every now and then for even better safety.