ATO doesn't make threats but other government departments do so obviously just hang up. Cowards use intimidation even if they are genuine authorities however don't let it get to you.

Caller: Scammers stating they are the Australian Tax Department and I owed money.

Rang them back eleven times to give them a bit of their own medicine. By the seveth call they were shouting down the phone for me to stop ringing.

Caller: Automatic Message

Answered phone without speaking and message started playing stating they were from the ATO for debt collection and I needed to call them back on the same number otherwise a warrant would be issued for my arrest and I would be arrested. I've recorded msg and have blocked number!!!

Caller: Unknown

Claiming to be the Australian Taxation Office; calling from Geelong, VIC.

Caller: Says ATO

American accent pre recorded message says from tax office because a law suit has started involving me.
I blocked it.

Caller: Overseas scammer

Claimed to be the Australian Taxation dept. I contacted the ATO and it is an overseas scam. Do not reply or give your details and report it to the ATO. Block the number on your phone

Caller: A robot

From 'ATO audit dept' threatening arrest if I don't get back to them. Just another of the many others using the 03 5294 prefix. What do they hope to achieve?