Transferring a domain from one registrar company to another traditionally involves the use of a special authorization code, which different companies call an EPP authorization code, a domain password or an Auth-Info code. This code can be used as a safety mechanism against unapproved transfers with all generic and with most country-code extensions. It can be obtained only by the domain owner and is issued by the current registrar company. It must be given to the new domain name registrar company because the transfer cannot be started without it. The code is case-sensitive and commonly includes digits and special characters, so as to stop unauthorized persons from breaking it. Some registrar companies even alter the codes of domain names registered through them from time to time for greater safety.