I own a rare collector car with a three-digit VIN. This has caused endless hassles at the DMV as well as the insurance office.
Sometimes we find success by prepending the necessary number of zeros, before the VIN. Other instances in the same system require appending zeros after the VIN. The true VIN has a hyphen but that never makes it into the DMV's system. One time I got stuck in a particularly nasty loop where the DMV mailed over thirty notices claiming the register would expire on 01/01/0000.