My son works for a florist who rented a van from a car rental company for deliveries. He was asked to drive the vehicle and in the course of doing so accidentally scraped the roof whilst parking under a tree at the direction of the employer. Apparently, the cost of roof repairs (over $3000) is not covered by the car rental insurance. The employer expects my son to pay. Can this be right?? The rental agreement is between the employer and the car rental company, and my son does not have a written contract of employment.