Transferring a domain name from one registrar company to another traditionally entails the use of a unique domain authorization code, which different registrar companies call an EPP authorization code, a domain name password or an Auth-Info code. This code can be used as a safety measure against unwanted transfer attempts with all gTLD and with most ccTLD extensions. The code can be obtained only by the domain name registrant and is issued by the current registrar. It must be given to the new domain registrar company because the transfer cannot be initiated without it. The code is case-sensitive and frequently contains digits and special symbols, so as to hinder unauthenticated persons from cracking it. Some companies even reset the codes of domain names registered through them every now and then for even better security.