Transferring a domain name from one registrar company to another normally involves the use of a special transfer code, which different companies refer to as an EPP key, a domain name password or an AuthInfo code. This code can be used as a security measure against unapproved transfers with all gTLD and with most ccTLD extensions. It can be obtained only by the owner of the given domain name and is provided by the present domain registrar company. It must be given to the new domain name registrar company because the transfer procedure cannot be started without it. The code is case-sensitive and commonly comprises of digits and special characters, so as to obstruct unauthorized individuals from deciphering it. Certain companies even change the codes of domain names registered through them after a certain amount of time for even greater safety.