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This study aims to examine the role of internal control and whistleblowing system in fraud prevention through a literature review appoarch. The background of this study is based on the persistenly high incidence of fraud cases that arise due to the suboptimal monitoring system and minimal compliance with applicable regulations in the organizations. Technique used is a literature review by examining varios relevant previous studies published between 2021-2025, obtained from google scholar. The result of the review indicate a significant correlation between internal control and whisteblowing system in efforts to prevent fraud in organizations in Indonesia. Internal control has a positive effect on fraud prevention efforts. Meanwhile, the whistleblowing system serves as a secure reporting mechanism, although several previuos studies show inconsistent result regarding its influence. The implication of this study highlights the importance of implementing effective internal control supported by an optimal whistleblowing system to enhance fraud prevention efforts within an organization.

Corruption in Indonesia has become a systemic and complex issue, posing a threat to economic, social, and political stability. Despite various efforts, including the establishment of the Corruption Eradication Commission and robust law enforcement, Indonesia’s Corruption Perception Index has remained stagnant or declined in recent years. This is primarily due to the inadequacy of conventional audit methods, which struggle to detect complex and hidden corruption schemes. This study examines how the role of investigative audits by the Supreme Audit Agency (BPK) can be optimized through synergy with the Whistleblowing System (WBS) to enhance corruption eradication efforts in Indonesia. Investigative audits, which focus on detecting fraud, are crucial as they can convert audit evidence into legal proof in corruption cases. However, the BPK’s role is often hindered by limited human resources, independence, and weak coordination. Using qualitative research and a literature review, this study analyzes relevant documents, books, scientific journals, and official reports to identify and classify relevant data. The findings indicate that strong synergy between BPK's investigative audits and the WBS is essential. Optimizing these two instruments requires significant reforms, including strengthening whistleblower protection laws, improving inter-agency collaboration, and fostering a robust anti-corruption culture. The study concludes that BPK’s investigative audits are effective in uncovering state losses, but their success depends on follow-up actions and coordination with law enforcement. The WBS can detect corruption early, but its effectiveness is limited by weak whistleblower protection and lack of trust in internal reporting channels.

Organizational fraud represents a significant global challenge, with estimated annual losses of 5% of revenue, totaling approximately US$4.7 trillion worldwide. This systematic literature review examines whistleblowing effectiveness as a fraud detection mechanism, analyzing the tension between its role as a transparency pillar and the retaliatory risks faced by whistleblowers. The study employed a qualitative Systematic Literature Review methodology, analyzing 25 peer-reviewed articles published between 2020-2025 from SINTA, Scopus, and registered E-ISSN journals. Literature was selected using keywords related to whistleblowing effectiveness, fraud detection, transparency mechanisms, and retaliation risk. Results demonstrate that whistleblowing systems significantly enhance fraud detection and prevention across both public and private sectors, with 24 of 25 reviewed studies confirming positive impacts. Effectiveness is influenced by individual attitudes, perceived behavioral control, organizational commitment, professional commitment, moral reasoning, and organizational culture. The integration of whistleblowing with forensic and investigative audit mechanisms creates a mutually reinforcing fraud detection framework. However, retaliation risk remains a substantial challenge, potentially undermining whistleblowing effectiveness. The study concludes that organizations must develop comprehensive whistleblower protection frameworks, cultivate supportive organizational cultures, ensure transparent report handling processes, and leverage technology to guarantee anonymity. A balanced approach between promoting transparency through whistleblowing and protecting whistleblowers from retaliation is essential for maximizing fraud detection effectiveness. Organizations are advised to integrate whistleblowing into comprehensive anti-fraud strategies with adequate protection mechanisms and whistleblower incentives.

Focus study This is how forensic audits , internal control , whistleblowing systems , good corporate governance (GCG), and culture organization have an impact on fraud prevention in a organization . Fraud is problem big that can cause loss financial big and destructive reputation company . Research this , based on review comprehensive literature , finding​ that forensic audits are very helpful prevent fraud . Forensic audit use the intended technique For detect fraud . Good internal controls are also important. For build a system that can supervise and manage source Power organization with good , reduce possibility fraud . In addition , the whistleblowing system is considered as tool important For prevent fraud because allows people to report Allegation violation without worry will consequence negative . The study also found that culture strong organization​ can help prevent fraud with create environment work that is moral and transparent . Many studies show that positive culture​ can increase awareness and compliance to policy fraud prevention . As a result , research This suggest that the organization minimize fraud risk with implementing forensic audits , strong internal controls , and a culture of good organization . The result will become more organization​ healthy , transparent and accountable .

Basically, minimizing fraud can be done by detecting fraud, but reducing fraud alone is not enough. Therefore, it is necessary to detect fraud. This article reviews research on factors that influence fraud detection, namely Audit Risk, Investigative Audit Techniques, Whistleblowing Systems. The purpose of this literature review is to develop hypotheses about the influence between variables for use in further research. The results of this literature research are that the science of Internal Control, Whistleblowing Systems, and internal audit have an influence on fraud prevention. This means that the better the knowledge of Audit Risk, Investigative Whistleblowing System Audit Techniques, that one has, the better the implementation in preventing fraud.

This study aims to determine the effect of employee perceptions of the culture of honesty, whistleblowing system and internal control system on fraud prevention. This study is a quantitative study using primary data obtained from questionnaires and measured using a Likert scale. The population in this study were all employees of PT BPR BKK Pekalongan Regency (Perseroda). The sampling technique used purposive sampling with sample criteria, in order to obtain a sample of 104 people. The data analysis technique used multiple linear regression analysis using the SPSS version 25 program. The results showed that the culture of honesty and the internal control system had a positive and significant effect on fraud prevention. Meanwhile, the whistleblowing system has no effect on fraud prevention.