Counterfeit $100 notes have been reported to be used in the Horsham and Ararat areas.
Police have advised businesses and residents needed to be aware there was 'fake cash' in circulation.
If anyone believes they have been a victim, they are encouraged to report it to local or federal authorities.
Any information about counterfeit notes can be reported to Crime Stoppers on 1800 333 000 or report online via www.crimestoppersvic.com.au.
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