Originally Posted by
tfung
.....but what is there stopping me from returning it a day later, or even a week later if I needed the car?
Nothing.
Car rental companies have little control over their inventory. They can only predict and plan. You can even return it to a different location not in the reservation. Some people do that when they don't offer one way rental. They just book a local rental and return it to a new city. You will be penalized in rate, but there is nothing they can do to stop you.
I am not sure about your case though.
