When a fare adjustment is made, we'll email you an updated receipt for the trip. This is typically why you receive an updated receipt.
Adjustments are made for a variety of reasons. An updated receipt details specific adjustments in the comment box.
If you would like more information about why an adjustment was made, please let us know. Use your app to select the trip in HELP. Head to Trips Issues and Refunds > I have a different issue > My trip receipt was updated.