I have a car booked with Avis for a one day one-way rental (noon-noon) and really only need a same day rental to go to my appointments and get to the airport hotel.

Instead of returning it the next day before my flight, I would like to return it the night before so I can just take the shuttle to the airport and not deal with the return in the morning.

Would this trigger any re-rates or any other issues?

Thanks!