Terrorism Threat Level

National Security Hotline

1800 123 400

If it doesn't add up, speak up.​​

Report suspicious behaviour

​​​​​​​​​​​​​​​​​​​​​​​The public plays a major role in providing information to law enforcement and intelligence agencies about possible terrorist and foreign interference activities.

Your call to the National Security Hotline is important. The hotline operates 24/7 and you can report your concerns about possible signs of terrorism and foreign interference in our community.​

Trust your instincts—even if you think it’s probably nothing, the smallest piece of information can be valuable. Terrorism and foreign interference are complex problems. It can be hard to know what might be important.

What you tell us could be vital, and we will always take you seriously.​

NSH operators will know what to do with the information you have given us. They will pass it on to law enforcement and security agencies for investigation​.

​These are some examples of suspicious behaviour or activities:

  • websites or social media promoting violent extremist ideology
  • excess purchasing of chemicals or other dangerous materials
  • someone you’re concerned is at risk of becoming radicalised
  • someone acting on behalf of a foreign government undermining Australia’s sovereignty or democracy
  • community members being intimidated or harassed by foreign actors
  • suspicious travel planning or abandoned luggage.​


We know that reporting a matter of concern can be a big step. We take your right to privacy very seriously. Tell the operator if you want to remain anonymous.

For more information on how we use and disclose your personal information, you can read the National Security Hotline’s  Privacy notice - National Security Hotline (425KB PDF).​​

See something suspicious?​

Make a report to the National Security Hotline by:
Phone: 1800 123 400
Email: hotline@nationalsecurity.gov.au​
SMS: 0429 771 822

National Security Hotline
​ Department of Home Affairs
PO Box 25
Belconnen ACT 2616

If you are travelling overseas and become aware of threats to Australia’s security​, you can contact the hotline toll-free on (+61) 1300 123 401.

If you need an interpreter, call the Translating and Interpreting Service on 131 450. You can ask them to call the National Security Hotline on 1800 123 400.

For TTY users, call 1800 234 889.

If your enquiry does not relate to National Security the below table may assist:​​​​ ​

If you are seeking assistance ​with:Contact:
Police, fire or ambulance response to a life-threatening emergency, or report a crime in progressPhone 000.
Reporting a crime, or getting advice about local security and safety issues in your communityPhone your local police on 131 444,
or Crime Stoppers on 1800 333 000.
Suspicious or illegal immigration, customs and border-related activityContact Border Watch.
Travel, whether leaving or coming into Australia, COVID-19 and travel restrictions, Australian passport queriesVisit Smartraveller for worldwide travel advice.

Australian Passport Information
Line: Ph: 131 232
(Mon-Fri, 8:00am – 9:00pm local time)
Website: https://www.passports.gov.au
​Scams and cybercrimeVisit via the Australian Competition & Consumer Commission (ACCC)​ website at https://www.scamwatch.gov.au​.

Visit ReportCyber via the Australian Cyber Security Centre (ACSC) website at https://www.cyber.gov.au/acsc/report.
Individuals defrauding welfare, child support, Medicare or Centrelink paymentsContact Fraud tip-off line on 131 524.
(Mon-Fri, 8:00am-5:00pm local time)

For further information see Services Australia, Reporting Fraud​.