Hi again...
Reasonably sure that you only need a RealMe ID if you're using the online ordering service.
You can still just order over the phone (BDM NZ +64 4 463 9362) with the birth details (surname, name, year and folio number).
And, of course, your debit/credit card number :-)
Order a printout @ $20.40 and ask for delivery by both email and normal mail.
The certificate @ $26.50 is just a transcription of the register whereas the printout is a scan of the register.
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The folio number is found on the BDM NZ microfiche held at most NZ libraries.
It's only a five minute job to look up the fiche so if you decide to purchase some printouts let us know and some kind soul will do a fiche lookup.
As you're overseas there's even a pretty good chance you can just phone BDM NZ with the names and years. No need for the folio number as every B, D and M from 1840 onwards is on their computer. Wouldn't take them a moment to find the relevant entry.
Regards
Beg