In internal auditing, reviewing the vendor master file for authorizations is a test to ensure that only authorized vendors are in the system, which directly relates to the effectiveness of control measures in place. This means verifying that the controls are effective in preventing unauthorized or fraudulent vendors from being added, thereby safeguarding the organization against potential risks such as fraud, unauthorized transactions, or compliance violations.References:
* Institute of Internal Auditors (IIA), International Standards for the Professional Practice of Internal Auditing (Standards), Standard 2120 - Risk Management.

Training new hires on fraud and employee misconduct is a proactive measure that raises awareness and educates employees about the organization's policies and the consequences of fraudulent behavior.
Such training helps create a culture of integrity and compliance, making employees less likely to engage in or tolerate fraud.
Continuous education and reinforcement of ethical behavior are essential components of an effective fraud prevention strategy