SYDNEY, Feb 28, 2026, 02:35 AEDT
- Commonwealth Bank has notified police, flagging suspicions of up to A$1 billion worth of home loans that may be fraudulent.
- AI is making it tougher to catch forged documents, putting broker and referral channels under even closer scrutiny as the probe deepens.
- CBA slipped 1.5% Friday, lagging a broader market that closed near its all-time peak.
Commonwealth Bank of Australia has notified both police and the corporate regulator after the lender uncovered roughly A$1 billion worth of suspected fraudulent home loans, Australian media reported. Shares in the bank finished the day 1.49% lower.
The issue is pressing for banks, which are grappling with a spike in identity and document fraud. This time, the arsenal looks different: artificial intelligence churns out fake payslips and documentation with ease, prompting lenders to overhaul their borrower verification processes.
It’s hitting just as Australia’s housing market faces heightened scrutiny. Most new mortgages run through brokers these days, making speed a major battleground. Should lenders drag out approvals to scrutinize paperwork more closely, both brokers and borrowers would notice the impact fast.
Mortgage Professional Australia says Commonwealth Bank took things up a notch after compliance checks and a look through customer loan files turned up suspect applications—some apparently produced by AI. The bank initially flagged the issue on its SpeakUP whistleblower platform back in February 2025, according to the report, and more complaints followed as the year went on.
A spokesperson for Commonwealth Bank pointed to “sustained and increasing levels of attempted fraud” hitting the whole industry, with criminals “actively evolve their methods.” Calling it “an industry-wide challenge,” the spokesperson mentioned fraud attempts surfacing in “mortgage broking and referral channels.” The bank, they said, invested A$900 million last financial year to strengthen its protections.
It’s not just one bank dealing with the fallout. Both Westpac and ANZ have flagged suspected bogus borrowing, according to the Australian Financial Review, joining NAB and Commonwealth Bank, which had previously raised similar red flags. The main concern: criminal groups may be using home loans to “wash” dirty money. https://www.afr.com/companies/financial-se…
The suspected fraud highlights the rapid advancements in forged documents. These days, AI-generated fakes carry convincing formatting, authentic-looking logos, and metadata—so basic visual checks just don’t cut it.
Toby Walsh, professor of AI at UNSW Sydney, flagged that “all banks will need to rethink their security” as the technology’s ability to imitate official documents keeps improving. https://www.tolerance.ca/ArticleExt.aspx?I…
Stolen data from large breaches can be pieced together into convincing fake identities, which are then leveraged in loan applications, according to Luke Irwin, a cybersecurity expert with Aegis Cybersecurity. “They’ll then use that … through various AI tools to create a document,” he said. https://7news.com.au/news/commonwealth-ban…
Commonwealth Bank shares took a hit Friday after suspected fraud clouded sentiment. Early in the session, the stock slipped nearly 2%, The West Australian noted, as investors digested talk of “potentially doctored applications.” This came even as the S&P/ASX 200 notched yet another record finish. https://thewest.com.au/business/markets/as…
The real squeeze for banks is right at the start of the mortgage game, where brokers—who originate the majority of loans—can make or break a deal with sheer speed. UBS puts brokers’ share of new Australian home loans at close to 80%, leaving lenders with little choice but to chase growth through these third-party channels.
The numbers aren’t set in stone. What remains unclear: just how much of the reported lending is outright fraud, if these issues are clustered in certain channels, and what the fallout looks like if borrowers default and property prices slip—shrinking the cushion behind the loans.
Commonwealth Bank and its rivals could react by stepping up verification, which tends to drag out approvals and bump up costs—think extra document screening or calling up employers directly. “Every time there’s that pressure,” Irwin said, governance processes can end up “shortened or clipped” if banks don’t carve out enough time for more thorough checks.
