Purpose This paper aims to provide new theoretical discussion about the role of whistleblowing system and fraud awareness as an effective deterrent for financial statement fraud. Design/methodology/approach The authors conducted surveys to 13 reputable public accounting firms in East Java, Indonesia. Findings It is well acknowledged, as fraud attacks grow more sophisticated, whistleblowing system and fraud awareness can be possible deterrents. By increasing employees’ fraud awareness, they do not only recognise fraud symptoms and typologies but also support to raise concerns in good faith and on reasonable grounds. This study also suggests the role of fraud awareness as a human capital investment that increase sensitivity on identifying fraud symptoms and discouraging participation in crimes. Originality/value This study produces new theoretical discussion about fraud prevention. Then this study also offers several aspects that can help organisation to establish effective whistleblowing systems and reporting mechanisms. Those aspects identified can encourage an individual to report malpractice or wrongdoing. This study also offers how fraud awareness can support the implementation of whistleblowing system in preventing fraudulent financial statements and other irregularities.