Transferring a domain from one company to another usually involves the use of a unique domain authorization code, which different companies refer to as an EPP authorization code, a domain name password or an Auth-Info code. This code can be used as a protection mechanism 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 and is provided by the present registrar. It must be given to the new registrar company because the transfer process cannot be started without it. The code is case-sensitive and traditionally comprises of numbers and special characters, so as to impede unauthorized persons from guessing it. Some domain registrars even alter the codes of domain names registered through them after a particular amount of time for greater security.