Transferring a domain from one company to another commonly entails the use of a unique domain name authorization code, which different registrar companies call an EPP key, a domain name password or an AuthInfo 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 issued by the current domain registrar company. It must be given to the new domain registrar company because the transfer procedure cannot be started without it. The code is case-sensitive and normally comprises of digits and special characters, so as to hinder unauthenticated people from cracking it. Some registrars even reset the codes of domains registered through them after a particular interval of time for greater security.