Transferring an active domain entails changing the domain registrar that provides the domain registration service, so after the transfer, you’ll have to manage things like renewal payments or DNS modifications through the new registrar. The transfer procedure itself is standard with most universal and country-specific TLD extensions. Some country-code extensions are more specific and entail different procedures, but in the general case transferring a domain involves a few basic procedures and one of them is unlocking the domain. The lock is a security feature, which is being adopted by more and more domain name registry operators. It’s a default feature supported by all generic TLDs. If a domain name is locked, it will not be possible to start a transfer procedure, so nobody can even try to register your domain. The domain lock can be annulled only through the account where the domain is registered in the first place and all new domains that support this option are locked by default the moment they are registered.