Transferring a domain from one company to another traditionally entails the use of a unique transfer 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 measure against unapproved transfers 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 current registrar. It must be given to the new registrar because the transfer procedure cannot be initiated without it. The code is case-sensitive and typically contains digits and special symbols, so as to impede unauthorized individuals from hijacking it. Some companies even change the codes of domains registered through them every once in a while for greater security.