These rules apply to every car booked through Bytnaa. Each office also sets its own conditions — age, deposit, mileage and fuel — and those are shown on its page before you book.
No. Booking on Bytnaa needs nothing up front; you pay the office at pick-up, and the refundable deposit, if any, is paid to the office and returned with the car.
Non-Syrians are advised to carry one alongside their national licence. Each office states on its page whether it accepts international permits.
You have a sixty-minute grace period. After that a full rental day is charged for each 24 hours or part of it, at the daily rate shown at booking.
Yes, free of charge until 24 hours before pick-up. After that, contact the office directly.