Hi there,
May I please ask for some further info re NZ BDM registrations, particularly for deaths and your mention that it was not compulsory to register until 1880.
I am happy to be corrected, as I have understood that in NZ, from 1847 it was not permitted to bury a body without a certificate from the Deputy Registrar. To me, that meant that the various Deputy Registrars would have kept registers of certificates issued and those records would be held by NZBDM even now.
I have skimmed through Papers Past and I can find the following cutting which excludes Natives from the regulations but everyone else seems to be required to abide by, but I see there's penalties for destroying the Register book etc :
https://paperspast.natlib.govt.nz/newspapers/NZ18470901.2.8?query=registrar general
New Zealander, Volume 3, Issue 131, 1 September 1847 (the heading is : Abstract of Births, Marriages, and Deaths, Registration Bill)
JM