If you think you’ve lost property in a car, tap Help and then Lost Property. Chose the trip you think you lost something on and tap the Umbrella at the bottom of the page. Then, just send us a message with all the details and we’ll see if we can reunite you with your possessions. If you didn’t book with our app we are not able to track the driver. In this instance you should contact TFL directly or your local police station.