Dame Nellie Melba
Such a banknote does not exist. The Australian One Hundred Dollar note was first issued in 1984.
The highest denomination of New Zealand banknote is currently the One Hundred Dollar note. The Reserve Bank of New Zealand has no plans to introduce a Two Hundred Dollar banknote in the foreseeable future.
The portrait of the first President of the United States of America, George Washington, appears on the front of the US $1 Dollar note.
The Australian One Hundred Dollar note is not rare at all. Since it is our highest denomination banknote, other than payday, most people do not have a pocket full of them.
All earlier Australian decimal banknotes remain legal tender in Australia even though they are no longer in circulation. You may have problems getting a shopkeeper of tradesman to accept an old banknote though. The Reserve Bank of Australia advises that old Australian banknotes can be presented at the Reserve Bank of Australia and most banks and exchanged for an equivalent value current Australian banknote.
No.
Edmund Barton has not appeared on any Australian banknote to date. The only politician to have ever graced an Australian banknote was Sir Henry Parkes on the 2001 Centenary of Federation Five Dollar note, he being one of the major motivational forces leading to the Federation of Australia.
There is no documented evidence that anybody has found an Australian Five Dollar note without the signatures. Assuming that your Five Dollar note is a legitimate Australian Legal Tender banknote and it also includes the Legal Tender declaration and a serial number, it would be very rare. Any such banknote should not have got past the quality control at Note Printing Australia.
Edmund Barton has not appeared on any Australian banknote to date. The only politician to have ever graced an Australian banknote was Sir Henry Parkes on the 2001 Centenary of Federation Five Dollar note, he being one of the major motivational forces leading to the Federation of Australia.
Dame Nellie Melba
No. The highest denomination New Zealand banknote is the One Hundred Dollar note. For large amounts bank or personal cheques tend to be used, or account transfers made.
Australia does not currently have, and is not likely to have a Two Hundred Dollar note anytime in the foreseeable future.