Suspect banknotes that are turned in to or seized by state or federal police are examined by the Reserve Bank of Australia. Detail on each confirmed counterfeit is recorded and aggregated. Analysis on counterfeiting is provided in the Reserve Bank of Australia's Annual Report each financial year.

Counterfeit data are presented in a ‘parts per million (PPM)’ format to provide context when comparing counterfeiting in different periods. PPM means the number of counterfeits detected for every million banknotes in circulation.

Historical counterfeiting data are published every six months and can be found in the Statistical Tables section of the RBA website.