It could be reported each time the car is serviced or at registration time. Seems to happen in the US like that - mainly as a disincentive to winding back the odo.
If people misreport it, it would be caught when they try to sell the vehicle. Eg, if I report 5K per year, but actually do 20K, then if I try to sell it in 5 years time, and it shows 25K on the Registration info, but 100K on the odo, then I’m not buying that car lol
HalfEarthMedic@slrpnk.net 13 minutes ago
I wondered about this also, FWIW my solution would be self reporting verified at the time of vehicle sale or end of vehicle life. I believe some states require periodic roadworthy checks which would also be an opportunity for verification.
Real time vehicle tracking is obviously unacceptable.