The odd $100 note may be floating around Auckland tomorrow as the city joins a worldwide treasure hunt trend.
The HiddenCash craze began last month when an anonymous millionaire began hiding cash in envelopes around San Francisco and posted clues of how to find it online.
He was revealed last week as property investor and philanthropist Jason Buzi and the craze has spread to the rest of the country and the UK.
A local version, named Find Our Cash, sent Whangarei locals into a money-searching frenzy, and it's now spreading across the country.
The man who brought the craze here — who wanted to be known only as Harry — posted clues on the Facebook page Find our cash Whangarei, while in Buzi's game the clues were under the Twitter handle @HiddenCash.