Transferring a domain from one registrar company to another usually involves the use of a special transfer code, which different registrar companies refer to as an EPP authentication code, a domain name password or an Auth code. This code can be used as a protection measure against unsanctioned transfer attempts with all generic and with most country-code extensions. It can be obtained only by the owner of the specific domain and is provided by the present domain name registrar company. It must be given to the new registrar company because the transfer process cannot be initiated without it. The code is case-sensitive and typically comprises of numbers and special characters, so as to hinder unauthenticated persons from guessing it. Certain registrars even change the codes of domains registered through them after a certain amount of time for greater security.