# The intervention comes as banks write to Treasurer Jim Chalmers, calling for data held by the.

*semiconductor · news · 2026-04-06 · Australian Financial Review*

## Key points

- The competition regulator has formally warned banks to strengthen due diligence on mortgage applications.
- Billions of dollars in loans were obtained using fraudulent documents at top Australian lenders.
- Banks are requesting access to Australian Taxation Office data through the open banking regime.
- Lenders believe ATO data access would improve verification of income on mortgage applications.

**Countries:** Australia

[Read the full story on Australian Financial Review](https://www.afr.com/companies/financial-services/accc-warns-banks-on-mortgage-due-diligence-amid-multi-billion-scandal-20260323-p5rmk0)

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