Used Van Leasing What Is The Penalty For Returning A Leased Car 1-2 Weeks Late?

What is the penalty for returning a leased car 1-2 weeks late? - used van leasing

I have traveled the country and my uncle has hired a van that I ask that you would not do. Unfortunately, it is assumed it will be about 10 days before the planned trip back. Why hire a car in one direction is super expensive, I know what kind of punishment would be if I had only the end of the truck. I also affects credit to my late uncle?

Thank you!