In NSW, Death Certificates came into being 1856. Before then they were Church Records. Therefore,
pre-1856 it was actually the church record of the funeral which was document of death, and if no body, no funeral, and no record. Hence the case of my ancestor who drowned with 2 others in Sydney Harbour 1822. Detailed newspaper accounts but no bodies recovered at all and no funerals, hence all three have no official record of their death.
When was the change over from Church Records to official Registration Records in Queensland (if any), pre or post 1873?
Les