Transferring a domain from one company to another typically entails the use of a unique transfer authorization code, which different registrar companies refer to as an EPP authorization code, a domain name password or an AuthInfo code. This code can be used as a safety measure against unapproved transfer attempts with all generic and with most country-code extensions. It can be obtained only by the owner of the given domain name and is issued by the current registrar. It must be given to the new domain name registrar company because the transfer process cannot be started without it. The code is case-sensitive and usually includes numbers and special characters, so as to hinder unauthenticated persons from deciphering it. Certain registrars even alter the codes of domains registered through them from time to time for even greater security.