AUSTRALIA'S banking watchdog has ordered the local arm of a Taiwanese bank to take action over concerns the lender was being targeted by criminals to launder funds or potentially finance terrorist operations.

The Australian Prudential Regulation Authority has called on Mega ICBC to freeze opening new accounts, produce a list of all its Australian staff and review its deposit book, with an eye to closing suspect accounts.

APRA initially became suspicious of Mega ICBC last year. The regulator's suspicions were confirmed when a review uncovered a ''significant and systemic level of potentially unusual and suspicious transactions'' within Mega ICBC that were not reported to authorities.

That review also found Mega ICBC's risk-management systems were ''inadequate, ineffective and did not adequately operate having regard to the risks they were designed to control''.

APRA raised concerns that some Mega ICBC staff were involved in the opening of deposit accounts contrary to the bank's own procedures. It also said some staff had participated in some structured transactions by the bank's customers.

Mega ICBC has agreed to have its remedial actions, including appointing qualified risk staff, reviewed by an independent expert, which will report to the bank regulator.

Mega ICBC yesterday confirmed several cash transactions had been made by a Brisbane-based customer that the bank had failed to report to the Australian Transaction Reports and Analysis Centre (AUSTRAC).

A Mega ICBC spokesman said a taskforce has been formed and outside consultants recruited to ensure full compliance with the anti-money laundering rules and the APRA recommendations.

The APRA review coincided with a separate investigation by AUSTRAC, which had concerns that Mega was failing to report suspect transactions.

In June, AUSTRAC named Mega ICBC and British giant Barclays as failing to prevent their services from potentially being used by criminals to launder the proceeds of crime or finance terrorist operations.

Among other things, Mega's audit procedures fell short of prudential rules and the bank did not have an effective system to monitor transactions under anti-money laundering and terrorism financing rules.

As part of AUSTRAC's findings, Mega ICBC was ordered to undertake a comprehensive review of all account transactions since January 2002.

In an enforceable undertaking entered into with APRA, Mega ICBC admitted its behaviour ''fell seriously short of acceptable banking practice''.

The Taiwanese bank said it would take steps to comply with APRA's demands. The bank has a relatively small presence in Australia, with a $1.5 billion lending book and deposits worth just over $400 million.