Yes, I know it can be your spouse or a family member. What I was asking is how do you let National know the name of the person, so they can put it on the reservation (if they do that).
Do you do that in advance, when you pick up the car, or not at all? The EC website says that the addtl. driver has to have a driver's license and credit card in their name, so there must be a way that they check this.
Thanks.