Jimster said:The second driver charge has NOTHING to do with insurance. It has to do with them making money. When you get a pizza and add another topping they charge you. Its the same concept. However, if its the second driver that is involved in an accident for example and you didn't arrange for a second driver, I believe it voids the rental agreement. Now what is the effect of that? It depends on each individual rental agreement and what is specified in it.
Yes, it would be interesting to see what "voiding a rental agreement" means in legal terms. Does that mean that the driver who is not covered by a second driver payment to the rental company is not liable for any damages to the rental car? I wonder how viable that argument is?