Transferring a domain name from one registrar company to another ordinarily entails the use of a special domain name authorization code, which different registrar companies refer to as an EPP key, a domain password or an Auth code. This code can be used as a protection 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 present domain registrar company. It must be given to the new domain registrar company because the transfer process cannot be initiated without it. The code is case-sensitive and traditionally contains digits and special symbols, so as to impede unauthenticated persons from breaking it. Some domain name registrars even change the codes of domain names registered through them after a given interval of time for greater safety.