Transferring a domain from one registrar company to another normally entails the use of a special domain authorization code, which different registrar companies refer to as an EPP key, a domain name password or an Auth-Info code. This code can be used as a security measure against unauthorized transfer attempts with all generic and with most country-code extensions. The code can be obtained only by the owner of the given domain name and is issued by the current domain registrar company. It must be given to the new domain name registrar company because the transfer cannot be started without it. The code is case-sensitive and normally comprises of digits and special symbols, so as to prevent unauthorized people from deciphering it. Some domain name registrars even change the codes of domains registered through them every once in a while for greater safety.