Transferring a domain name from one registrar company to another typically entails the use of a unique transfer code, which different companies call an EPP authentication code, a domain name password or an AuthInfo code. This code can be used as a protection mechanism against unwanted transfers with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain registrant and is provided by the current registrar company. It must be given to the new registrar because the transfer cannot be initiated without it. The code is case-sensitive and frequently includes digits and special symbols, so as to obstruct unauthorized individuals from cracking it. Some registrar companies even change the codes of domain names registered through them after a particular period of time for even better safety.