Transferring an existing domain name entails switching the domain registrar that provides the domain registration service, so after the transfer, you will have to manage things like renewal fees or DNS updates through the new company. The transfer process itself is standard with most generic and country-code Top-Level Domain extensions. Some country-code extensions are more specific and involve different procedures, but in the general case transferring a domain name entails a few basic steps and one of them is unlocking the domain. The lock is a security option, which is being adopted by more and more domain registry operators. It is a default feature supported by all generic top-level domain names. If a domain name is locked, it will be impossible to start a transfer procedure, so nobody can even attempt to steal your domain name. The lock can be removed 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.