Transferring a domain name from one registrar company to another traditionally entails the use of a special domain authorization code, which different registrar companies call an EPP authorization code, a domain password or an Auth-Info code. This code can be used as a protection measure against unwanted transfer attempts with all generic and with most country-code extensions. It can be obtained only by the domain name owner and is issued by the present registrar. It must be given to the new domain registrar company because the transfer procedure cannot be initiated without it. The code is case-sensitive and traditionally contains numbers and special characters, so as to prevent unauthorized people from hijacking it. Certain domain registrars even change the codes of domains registered through them after a particular amount of time for greater security.