I know in California it is very common for carcover owners to put their license plate number in big fonts on the cover itself with a laundry marker. Primary reason is a detterent against car cover thieves, and secondary, for ID purposes. Makes it easier for meter maids.shootist said:
That would be a great way to hide a stolen vehicle after a joy ride, though- pop a cover on it, and leave it until someone decided to look under the cover for the plates and registration sticker.
Might be weeks.