Enable a lock at the domain registry level (Verisign, CIRA, etc.) for stringent security. Like the registrar lock, registry locks are effective even if the security of your account is compromised. No attributes of the domain can be altered without coordinated action by both the registrar and registry.
For the lock to be disabled, an authorized registrar (Webnames) representative must work directly with the Registry Operator, completing a rigorous offline multi-step authentication process.