Making sure the right boxes are ticked through the car hire process will not just protect you and your boss from hidden costs, but could also save money while ensuring a stress free trip. The top tips derive from the most common mistakes made by hirers through major agencies.    Excess Insurance  All car hire companies offer excess insurance policies at collection, but these are often more expensive than when booking in advance with a third party. Collision damage waiver cover can be obtained easily online prior to a trip and in many cases will save you money before you ...