An internal auditor has suspicions that some fictitious vendors have been created in the organization's...

The best technique to detect fictitious vendors in the organization's computer system is to run checks to find matches between vendor and employee addresses. This method is effective because fictitious vendors often have addresses that match those of employees creating them. This kind of analysis targets the direct linkage between fraudulent activities and internal entities, which is a common red flag in vendor fraud scenarios.

Association of Certified Fraud Examiners (ACFE) - Techniques for Fraud Detection