Rental conditions
Car rentals are subject to many conditions which vary from one country to another and from one company to another. Generally the vehicle must be returned in the same condition it was rented in, and often must not exceed mileage restrictions, otherwise, extra fees may be incurred.
For insurance reasons, some companies stipulate a minimum and/or maximum rental age. In some cases, the minimum age for rental can be as high as 25, even in countries where the minimum legal age to hold a driver's license is much lower, e.g. 14,15,16 or 17 in the United States. It is not uncommon for there to be a young driver surcharge for all drivers aged under 25.
In all cases, a valid driver's license is required in order to rent a vehicle, and some countries require an International Driving Permit (IDP).
The majority of car rental companies require the use of a credit card to charge additional fees should a defect be found with the car on its return or for road tolls, motoring related fines, or missing fuel. In lieu of a credit card, some companies require a large cash deposit. Some companies permit a debit card for deposits, typically with proof of a round-trip travel ticket, e.g. an airline, bus, or train ticket.