Transferring a domain name from one registrar company to another commonly involves the use of a unique transfer authorization code, which different registrar companies refer to as an EPP authorization code, a domain password or an AuthInfo code. This code can be used as a protection measure against unauthorized transfer attempts 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 registrar. 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 ordinarily contains digits and special characters, so as to stop unauthorized persons from breaking it. Some domain registrars even change the codes of domain names registered through them every now and then for better security.