Rented a car online through VIP cars. com, for pickup at Sanford airport. Reservation booking from national was received by email. VIP cars asked for $25 deposit to secure rate. If I wanted to not pay a deposit, weekly rate is much higher. Got to Sanford, to National counter, and very helpful agent said since booking was done through VIP cars, and they entered a company name from some web firm in India in the booking, unless we produced verification I worked for that company, my weekly rate would nearly triple in price. I had no idea who that web firm was. VIP cars sold us a corporate rate timeshare, if you will, and since we don't work for that corporation, national couldn't honour it. Thank goodness national helped us rent a car independently. Asked VIP for my deposit back. No response.