National Australia Bank and three casino operators may need to pay hefty fines or overhaul their operations after a blitz by the financial crimes watchdog.
The bank, Crown Resorts, SkyCity and Star Entertainment on Monday revealed watchdog AUSTRAC had serious concerns about their efforts to prevent money laundering and the financing of criminal groups.
The Australian Transaction Reports and Analysis Centre (AUSTRAC) is a government agency tasked with making sure criminals cannot exploit the financial system.
Westpac recently fell foul of the watchdog after revelations its lax standards allowed child abuse groups and others to shift money overseas.
The bank paid a $1.3 billion fine last year, and has other requirements to ensure its meeting legal obligations.
AUSTRAC said fines were not being considered for National Australia Bank.
The two have been working to improve the bank's controls since 2017.
However, AUSTRAC could force the bank to make sweeping changes to its systems, as it did with Westpac.
NAB boss Ross McEwan said the bank was improving in this area and clearly had more work to do.
Shares were down by 3.02 per cent to $26.68 at 1525 AEST.
Crown Resorts' woes continued after AUSTRAC widened its investigation of the company to include its Perth casino.
The watchdog has found the Perth venue has potentially serious problems in meeting anti-money laundering obligations.
AUSTRAC is already investigating Crown Melbourne for the same reasons.
Royal commissions into Crown's operations in Victoria and Western Australia continue.
A NSW inquiry found Crown allow money laundering and put staff in China in danger of being detained.
Shares were lower by 1.5 per cent to $12.50.
Sydney casino operator Star Entertainment was told it also has potentially serious problems with its anti-money laundering efforts.
Star said it has not been told what action AUSTRAC may take.
Shares were down by 2.27 per cent to $3.88.
Adelaide casino operator SkyCity Entertainment fielded similar concerns.
Shares were lower by 7.06 per cent to $3.13.