Guidelines need to be set for various levels of suspected fraud within an organization and...

Fraud involving significant amounts, such as theft using collusion for more than $10,000, should be reported to the audit committee at the next meeting. This type of fraud indicates a higher level of risk and potential impact on the organization, which makes it critical for the audit committee to be informed promptly so that appropriate measures can be taken.

Guidelines on fraud reporting from the Institute of Internal Auditors