An accounts payable clerk who has access to the vendor master file replaced the payment...

Approval of master file change requests by the accounts payable supervisor could have prevented the fraud described. This control ensures that changes to critical financial information, such as vendor payment details, are verified and authorized by a responsible authority, thereby reducing the risk of unauthorized alterations and fraud.

IIA guidance on internal controls related to fraud prevention, which emphasizes the importance of control activities such as supervisory approvals for changes in critical financial data to prevent unauthorized transactions.