A fleet manager can see the accurate amount of money being spent on fuel and check that with the actual mileage readings and even the trip histories. (telematics.com)
Even With The Incredible Low Mileage Reading The Car Has Only Been Maintained By BMW Main Dealers With Past Historical Service Visits Logged At 4985, 6450, 8510, 10089, 13770, 17813, 18099, 18325, 18855, 19535, 20121 & 20495 Miles. (classicandperformancecar.com)
In the UK, you can use the registration number of a vehicle along with the manufacturer and obtain a complete MOT history which includes mileage readings. (mechanics.stackexchange.com)