Transferring a domain name from one registrar company to another normally involves the use of a special transfer code, which different registrar companies refer to as an EPP key, a domain name password or an AuthInfo code. This code can be used as a protection measure against unauthorized transfers with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain owner and is issued by the present 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 commonly contains numbers and special symbols, so as to impede unauthenticated persons from breaking it. Some domain name registrars even reset the codes of domain names registered through them every now and then for greater safety.