Transferring a domain name from one company to another usually entails the use of a unique transfer code, which different companies refer to as an EPP key, a domain name password or an Auth code. This code can be used as a protection measure against unsanctioned transfers with all generic and with most country-code extensions. It can be obtained only by the owner of the given domain name and is provided by the current registrar company. It must be given to the new registrar company because the transfer cannot be initiated without it. The code is case-sensitive and normally comprises of digits and special symbols, so as to obstruct unauthenticated people from hijacking it. Certain registrar companies even alter the codes of domains registered through them after a given period of time for better security.