A computing system receives location data from a computing device of a transport provider and based on the location data, monitors a location of the transport provider as the transport provider operates a vehicle to travel towards a service location of the service request. The system determines, based on monitoring the location of the transport provider, that the transport provider has not indicated at least one of a correct start location or a correct start time for fulfilling the service request. In response to determining that the transport provider has not indicated the at least one of the correct start location or the correct start time, the system uses a set of the location data received from the computing device of the transport provider to determine the at least one of the correct start location or the correct start time for fulfilling the service request.