Robocall - message in female American accent from Dept. of Home Affairs advising an investigation had discovered my identity had been used in connection with illegal activities. I was told to press (1) to discuss further. I did not, the call then aborted. Checking the ACCC website (https://www.accc.gov.au/media-release/government-impersonation-scams-on-the-rise), this is a well known scam technique. I'm glad I didn't follow through with robocall demand as there could've been extortion threats made.