> In many US jurisdictions, the county clerk is not responsible for checking to see if the person recording the transfer deed has the legal right to do so; that's up to other parties involved. But under the Torrens system you describe, it seems like the government land registry would have to do such a check in order to make the guarantee it makes. But how can it? It doesn't control or have access to things like wills in other jurisdictions that determine who has the legal right to take title to a property.
Commonly what happens-in legally complex situations, they’ll refuse to register the change in ownership; and then you have to challenge their refusal in the local jurisdiction’s courts-which are much better equipped to deal with complex legal issues, especially those involving interactions with foreign jurisdictions than the lands title registry is-and if you convince the court, they’ll order the registry to register the title change.
For deceased estates, they want to see an order from probate court telling them what to do before they do anything (if there is a will which nobody disputes, such an order is basically a formality). They don’t accept overseas court decisions; you need to apply to a local court asking for an order for the execution of the foreign judgement, and if the local court grants it, then the land registry will action it.
In your scenario where someone dies in another state, the legal process in Australia is-you apply to the probate division of the Supreme Court of their state of residence for an order of probate. Then you apply to the probate division of the Supreme Court of the state in which the property is located to get an in-state court order endorsing the out-of-state court order as valid. Then you send both court orders to the land title registry, and it will register the change of title in accordance with them. All the land title registry has to do is (a) validate the court order is real (I think they have access to court computer systems to double-check this); (b) in the (very rare) case there is any vagueness or ambiguity in what the court order tells them to do, they’ll reject it and tell you to get another court order with more precise instructions.