Caller claimed they were from the International Fraud Dept of the Commonwealth Bank. Said that they'd flagged an attempted debit of $1,800 from my account. i only have Visa account with the CBA and the balance is so low that no way would a debit that size be accepted. They didn't say what kind of account they were talking about. I checked my CBA Visa account and there's been no suspicious activity. I believe this was a ploy to get me to provide my account and person info to them. Beware!