Transferring a domain from one company to another normally involves the use of a unique transfer code, which different companies refer to as an EPP key, a domain name password or an Auth-Info code. This code can be used as a safety measure against unsolicited transfers with all gTLD and with most ccTLD extensions. It can be obtained only by the owner of the given domain and is issued by the present registrar company. It must be given to the new domain name registrar company because the transfer process cannot be initiated without it. The code is case-sensitive and often comprises of numbers and special characters, so as to impede unauthorized persons from deciphering it. Certain registrars even change the codes of domains registered through them every now and then for better safety.