AutoUnion Car rental in Patras Greece

We had an early flight back and did not know how to return the car if the rental point in the city does not work around the clock. We called the dispatcher service, they advised us to come to the rental point and solve the issue there inconsequentially. It turns out that you have to bring it at any time and throw the keys into a special box, but it was uncomfortable for us at night and in the end we handed over the car a day earlier. Lost money for the day of rent ... If they had figured it out earlier, the reservation would have been made for a day less.