If company vehicles will be used, those vehicles should be fully insured to protect businesses against liability if an accident should occur. At the very least, businesses should insure against third-party injury, but comprehensive insurance will cover that vehicle in an accident, as well. If employees are using their own cars for business, their own personal insurance will cover them in the event of an accident. One major exception to this is if they are delivering goods or services for a fee. This includes delivery personnel.