There are no mandatory charges in addition to the amount shown on your confirmation voucher, however, upon vehicle pickup, the rental agent may offer additional services and insurance coverages, as well as vehicle category upgrades. Such services are optional and shall be refused by the customer if not interested. The non acceptance of such optional services does not impede the customer from renting the vehicle. Carefully read the rental contract before signing to make sure that only requested services have been included, because once any optional services have been accepted the total rental charges will be altered and no amounts will be refunded.