Transferring a domain name from one registrar company to another commonly entails the use of a special domain authorization code, which different companies call an EPP authorization code, a domain password or an Auth code. This code can be used as a security measure against unauthorized transfers with all generic and with most country-code extensions. The code can be obtained only by the domain name owner and is issued by the current domain 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 often comprises of digits and special characters, so as to prevent unauthorized persons from cracking it. Some registrar companies even reset the codes of domains registered through them after a certain period of time for even better safety.