Transferring a domain from one company to another typically entails the use of a special transfer authorization code, which different companies refer to as an EPP key, a domain name password or an Auth-Info code. This code can be used as a protection measure against unsolicited transfer attempts with all generic and with most country-code extensions. The code can be obtained only by the domain name registrant and is issued by the present 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 generally comprises of digits and special symbols, so as to hinder unauthenticated persons from guessing it. Certain domain name registrars even change the codes of domain names registered through them every once in a while for even better safety.