The latest arrest comes following a two and a half year police operation into the theft, which allegedly occurred after a $10 million overdraft facility was mistakenly loaded into the man's business account in April 2009.
It is alleged that the man transferred $6,782,000 of the money into other accounts, and then the couple both left New Zealand for Hong Kong.
The error was not discovered until May 5, when approximately half the money recovered from New Zealand accounts, leaving $3,872,000 unrecovered.
The 36-month investigation has involved police from around New Zealand, and in China and Hong Kong.
"There has been a significant amount of work underway behind the scenes - but for obvious reasons we haven't been in a position to discuss it,'' said detective inspector Mark Loper.
It is not yet known whether the man will need to be extradited as he will be given the opportunity to return to New Zealand voluntarily.
- HERALD ONLINE