Transferring a domain from one company to another generally entails the use of a unique transfer code, which different registrar companies refer to as 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 generic and with most country-code extensions. It can be obtained only by the owner of the given domain and is provided by the present domain registrar company. It must be given to the new registrar because the transfer process cannot be started without it. The code is case-sensitive and typically includes digits and special characters, so as to obstruct unauthorized people from deciphering it. Certain companies even alter the codes of domains registered through them after a particular interval of time for even better security.