We just returned from Orlando where we rented a car from National. . We have used National in the past and never had any problems (our most recent was Nov 2005). This time upon checking in they were going to charge us $8 per day to add an additional driver to the car (myself - over 25). Obvoiusly we chose not to however this has never been an issue before. We have always supplied both of our DL #'s without any addtional fee.