Resources and contact information

​​​​​​​​​​​​​​​​​Contact u​​s

If you need urgent help and assistance during:

Our Resources page also provides links to useful documents and other Australian and international government departments and agencies which can help you in managing critical infrastructure security and resilience.​

Online forms​

If you can't find what you're looking for or need more information, use our General enquiry form​.​​

Compliments, complaints or suggestions

Your feedback is valuable to us. It informs business improvement opportunities and further enhances the quality of our services. We welcome your feedback through our ​​feedback form.


​Call us on 1300 272 524 ​(Monday - Friday 9:00am - 5:00pm AEST).​

​If you have a hearing or speech impairment, use the National Relay Service. Provide them with 1300 272 524 as the number you would like to call.​​​


Enquiry type​
​Email address

​Critical Infrastructure Enquiries
​Critical Infrastructure Reforms Enquiries
​Critical Infrastructure Engagement Enquiries
​AusCheck (background checking, and ASIC/MSIC Discretionary Cards)
​Aviation & Maritime Security Enquiries​
​Aviation & Maritime Security Enquiries (Critical Infrastructure reform)
​​Department of Home Affairs ASIC and MSIC Applications

Telecommunications Sector Security Enquiry

If you require a document in an alternate format for accessibility purposes, please contact us using the TSS enquiry form.