Hi all, Just thought I'd drop in my tuppence worth. We run the Irish National Mileage Register and collect mileage data for similar purposes as HPI (our car history website is called Motorcheck.ie). Our data sources are similar but with one exception. We don't use mileage readings provided by private individuals purchasing a car history check. We felt this was an area that would be open to abuse (false readings being submitted against cars) and wanted to make the data as reliable as possible. However, we take the view that the national mileage register should be there to facilitate and validate the sale of a legitimate reading as well as uncover any cases of clocking. We realise that mileage data aggregated on a large scale will always contain a small percentage of errors. Whether it's simply human error at the input stage or mistaking a mileage reading for kilometers it can be annoying when a car history check shows up a perfectly legitimate car as having a 'mileage discrepancy'. Our policy is to remove any offending readings from the database once they can be proven to be false. If the incorrect reading has damaged a sales opportunity we're always happy to speak with a potential purchaser and explain where the incorrect reading came from and how we're rectified it on our database. At Motorcheck we feel that a good car history check service should protect both buyers and sellers. That's why we're always happy to listen to any customer who has issues with the data we provide.