Transferring an already registered domain involves switching the domain name registrar that provides the registration service, so after the transfer, you will have to manage things like renewal fees or DNS modifications through the new domain registrar. The transfer process is standard with most domain extensions. Certain country-code extensions are more specific and entail different procedures, but in the general case transferring a domain involves several necessary procedures and one of them is unlocking the domain. The lock is a security option, which is being adopted by more and more domain registry organizations. It is a default feature supported by all generic Top-Level Domains. If a domain name is locked, it will be impossible to start a transfer procedure, so nobody can even try to snatch your domain. The domain lock can be annulled only through the account where the domain name is registered and all new domain names that support this functionality are locked by default the moment they are registered.