All generic extensions and several country-code ones support a security lock option whose function is to stop unwanted transfers of existing domains. Many domain registry operators that manage country-code TLDs that do not support this feature are in the process of introducing it for better security and for the convenience of the domain registrants. A domain can be transferred only on the condition that it is unlocked and only a person who has access to the account with the current domain registrar can achieve that. New domain names are registered with the lock option activated on purpose, so as to block any unsanctioned transfer attempts. The lock feature is among the safety measures for regulating the transfer of existing domain names between registrar companies that have been introduced over the years.
