There has been reports by the Australian media that high quality Australian counterfeit notes in 100 and 50 denominations has flooded the country. With a high probability that these notes might maker their way to SIngapore, the MCA advises all members and consumers to be wary of buying or selling such notes. If any persons or members come across these notes, please alert the police immediately as it is a chargable offence. Members and consumers may follow the link of the Reserve Bank of Australia to know the features that will distinguish a genuine note from a counterfeit one.
http://banknotes.rba.gov.au/counterfeit-detection/counterfeit-detection-guide/