Transferring a domain from one registrar company to another ordinarily involves the use of a special authorization code, which different registrar companies call an EPP key, a domain name password or an Auth code. This code can be used as a protection measure against unapproved transfers with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain registrant and is issued by the current registrar. It must be given to the new domain registrar company because the transfer procedure cannot be initiated without it. The code is case-sensitive and commonly contains numbers and special characters, so as to hinder unauthorized individuals from hijacking it. Some domain name registrars even reset the codes of domains registered through them after a given interval of time for better security.