If you think you are going to be late for the drop-off, change the time via the app. A later reservation already associated with the vehicle may make this impossible, in which case you will have to return the vehicle as soon as possible. There is a 10-minute grace period after the return time has expired, after which you will be charged penalties, calculated per minute, until the booking is closed, as indicated in the Europcar On Demand Price List in effect at the time of rental and available here.
