Transferring a domain name from one company to another typically entails the use of a special domain authorization code, which different companies refer to as an EPP key, a domain password or an Auth-Info code. This code can be used as a protection mechanism against unsanctioned transfers with all gTLD and with most ccTLD extensions. The code can be obtained only by the owner of the specific domain name and is issued by the current domain name registrar company. It must be given to the new domain name registrar company because the transfer procedure cannot be initiated without it. The code is case-sensitive and often includes digits and special characters, so as to impede unauthorized persons from hijacking it. Certain companies even change the codes of domains registered through them from time to time for even better security.