Vehicle registration
Contact the state or territory road authority; transfer or cancel registration per local rules once the estate is authorised
Some steps differ by region inside the country.
Where
The state or territory road authority, such as Service NSW, VicRoads, or Transport and Main Roads.
How
Check the registration details online through the state road authority using the plate number.
Notify them of the death and ask what is required to transfer or cancel the registration.
Obtain any roadworthy or safety inspection your state requires before a transfer.
Arrange insurance in the new owner's name before anyone drives the vehicle.
What to bring
A certified copy of the death certificate
The grant of probate or evidence you are the executor
The registration papers and vehicle identification number
A roadworthy or safety certificate if your state requires one for transfer
This is practical information, not legal, medical, or financial advice.