Recorded message claiming to be from Commonwealth Bank Credit Card Fraud department. Said there had been 2 attempted transactions and said the transactions had been stopped because they were not suppliers that I had paid in the past, said press 1 to allow the transactions and 2 to cancel.

Then was put through to an operator who could hardly speak english
Asked for first 6 digits of my card number.
I said i would call the Commonwealth bank back and the person disconnected the call.