Transferring a domain name from one company to another typically involves the use of a unique transfer authorization code, which different registrar companies call an EPP authorization code, a domain name password or an AuthInfo code. This code can be used as a safety mechanism against unsanctioned transfer attempts with all generic and with most country-code extensions. The code can be obtained only by the owner of the given domain and is issued by the current registrar company. It must be given to the new domain registrar company because the transfer cannot be started without it. The code is case-sensitive and often includes digits and special symbols, so as to stop unauthenticated people from deciphering it. Some companies even alter the codes of domain names registered through them periodically for even greater safety.