Transferring a domain name from one registrar company to another usually involves the use of a special transfer code, which different registrar companies call an EPP authorization code, a domain name password or an Auth-Info code. This code can be used as a safety measure against unsanctioned transfer attempts with all generic and with most country-code extensions. It can be obtained only by the owner of the given domain and is issued by the present domain name registrar company. It must be given to the new domain name registrar company because the transfer cannot be initiated without it. The code is case-sensitive and usually contains digits and special symbols, so as to obstruct unauthenticated people from breaking it. Some companies even change the codes of domains registered through them after a certain amount of time for better security.