Landmark White disclosed that a string of other lenders had also suspended it and called another trading halt in its shares on Tuesday, a day after it dismissed its earlier suspension by CBA and ANZ as the moves of a "small number of clients".

In a statement after the market had closed, the troubled valuation firm said National Australia Bank, Bankwest, Bendigo & Adelaide Bank, Suncorp, HSBC and Latrobe had also stopped using it for valuation work, even as it maintained the data breach that triggered their decisions – the second this year – did not constitute a notifiable breach under law as only limited private information was contained in the documents posted onto document sharing site SCRIBD.