If your personal information falls into the wrong hands, it can be used to steal your identity.
If you've been affected by the recent Optus data breach, the Office of the Australian Information Commissioner has information on how to respond to a data breach.
The ACCC's Scamwatch has released information on the latest scams arising from the breach.
It's important to:
report the breach to your bank and super fund
change your passwords
be on the lookout for suspicious emails, phone calls, texts or messages through social media
keep close watch on your bank account for any unauthorised transactions
request a temporary ban on your credit report to ensure no unauthorised loans or applications