Case Study: Bank of New Zealand achieves 75% drop in counterfeit card fraud with ACI Worldwide's Proactive Risk Manager

Bank of New Zealand Addresses the Issue of Counterfeit Cards

Bank of New Zealand faced a growing wave of counterfeit card fraud that was eroding customer confidence and forcing disruptive card reissues. To strengthen fraud detection without inconveniencing customers, BNZ relied on ACI Worldwide and its ACI Proactive Risk Manager solution as a core part of its fraud-management toolkit.

BNZ implemented a Liquid Encryption Number (LEN) that changes the last three digits on a card’s magnetic stripe each time it’s used at a BNZ ATM, and simply adjusted rules in ACI Proactive Risk Manager to flag mismatched, out‑of‑date mag‑stripe data. The combined approach — delivered using ACI Worldwide’s platform — cut counterfeit card fraud by about 75%, reduced losses and card reissues, improved customer satisfaction, and now protects roughly 750,000 customers.

Bank of New Zealand

Steven Mockett

Chief Operating Officer