Trust is good - but control is better.
If you have company cars, and others than family members who drive them, you must always be aware that these cars might be used in a different way.
Little shopping tours, for example, or using the car as a taxi over the night or the week-end.
In any case: time is money, and also the fuel prices are not likely to diminish in future. Not to mention the risk of accidents.
With NamTrack you can not only retrace the whereabouts of your vehicle with complete evidence - you also have the possibility to define "Home" or "No-Go" areas and get notified whenever your vehicle enters or leaves such a zone.