You are responsible for a project where the UN has acquired a vehicle for the duration of a capacity-building project.

As the project officer you discover that your counterpart in the NHRI, or a UN staff person working on the project, has commandeered the vehicle for personal use and generally organising the scheduled time of the driver around his or her personal schedule. The vehicle is rarely available for its official purpose. You cannot openly confront the person without exposing the source of your information. What should you do?