Australian Government Department of Health
Report Suspected Fraud 
Information on different types of health fraud and how to report suspected frauds (eg aged care, mental healthcare providers, corrupt staff etc)
Australian Government Department of Human Services 
To report fraud against Centrelink, Medicare or Child Support
Fraud Tip-off Line
Phone: 131 524 (Mon – Fri, 8am to 5pm ACST, excluding South Australian public holidays)
ACCC – Australian Competition and Consumer Commission
Little Black Book of Scams
Publications
Scamwatch
ACNC – Australian Charities & Not-for-profits Commission
To verify a charity is in fact a charity via a search of the ACNC Charity register
FBI
On the Internet Crime Prevention Tips
Learn tips for protecting your computer, the risk of peer-to-peer systems, the latest e-scams and warnings, Internet fraud schemes, and more.
Insurance Fraud Bureau of Australia (IFBA)
Report an instance of suspected insurance fraud
WatchOut! 