Transferring a domain name from one registrar company to another commonly involves the use of a unique transfer authorization code, which different companies refer to as an EPP authorization code, a domain password or an AuthInfo code. This code can be used as a protection mechanism against unauthorized transfer attempts 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 process cannot be started without it. The code is case-sensitive and usually comprises of numbers and special characters, so as to impede unauthorized persons from breaking it. Certain registrars even alter the codes of domains registered through them after a certain amount of time for even better security.