Transferring a domain name from one company to another typically involves the use of a special domain name authorization code, which different registrar companies call an EPP key, a domain password or an Auth-Info code. This code can be used as a security 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 name and is provided by the present registrar company. It must be given to the new domain registrar company because the transfer cannot be initiated without it. The code is case-sensitive and commonly comprises of digits and special symbols, so as to prevent unauthorized individuals from guessing it. Certain domain registrars even change the codes of domain names registered through them after a particular period of time for better safety.