Transferring a domain from one company to another normally involves the use of a special authorization code, which different registrar companies call an EPP authentication 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 registrant and is provided by the present domain registrar company. 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 typically contains digits and special characters, so as to stop unauthorized people from cracking it. Some companies even alter the codes of domain names registered through them once in a while for even greater security.