The details of how a former ASB banking executive and fraudster took the money is to remain secret for another month.
Stephen Versalko pleaded guilty earlier in February to three fraud charges laid by the Serious Fraud Office involving almost $18 million.
Versalko took the money over a nine-year period through fraudulent transactions and by offering fictitious investment opportunities to ASB clients.
It is the biggest case of employee fraud in New Zealand to date.
Versalko re-appeared in the Auckland District Court on Tuesday. However, the summary of facts that outlines how he took the money will remain suppressed until his sentencing in March.
Defence lawyer, Stuart Grieve, QC, told the court restitution of $3 million to $5 million would be made through the sale of assets belonging to Versalko.