Transferring a domain from one company to another commonly involves the use of a special authorization code, which different companies refer to as an EPP authentication code, a domain name password or an Auth code. This code can be used as a protection mechanism against unsolicited transfer attempts with all generic and with most country-code extensions. The code can be obtained only by the owner of the specific domain and is issued by the present domain registrar company. It must be given to the new domain registrar company because the transfer procedure cannot be started without it. The code is case-sensitive and typically includes digits and special symbols, so as to impede unauthenticated persons from guessing it. Some domain registrars even change the codes of domains registered through them every once in a while for greater safety.