Transferring a domain name from one registrar company to another usually entails the use of a unique transfer authorization code, which different registrar companies call an EPP authentication code, a domain name password or an Auth code. This code can be used as a protection mechanism against unauthorized transfers with all generic and with most country-code extensions. The code can be obtained only by the owner of the specific domain and is provided by the present registrar. It must be given to the new domain registrar company because the transfer cannot be started without it. The code is case-sensitive and generally contains digits and special symbols, so as to impede unauthenticated persons from guessing it. Certain domain registrars even change the codes of domain names registered through them periodically for even greater safety.