Transferring a domain from one company to another normally involves the use of a special transfer authorization code, which different companies refer to as an EPP authentication code, a domain password or an AuthInfo code. This code can be used as a safety measure against unapproved transfers with all generic and with most country-code extensions. It can be obtained only by the owner of the specific domain and is issued by the current registrar. It must be given to the new registrar because the transfer cannot be initiated without it. The code is case-sensitive and commonly includes digits and special symbols, so as to hinder unauthorized individuals from cracking it. Certain registrar companies even change the codes of domain names registered through them after a particular interval of time for even greater security.