Actually it is not illegal to remove fender tags by the owner, just like it is not illegal to remove the tags on your pillows. It is however illegal for anyone else to remove these tags if you are not the owner or do not have the owners permission. It is illegal to remover the fender tags and sell them but at the same time, there are numbers on these tags which match numbers stamped on some body parts which must match, otherwise it will be looked at like a stolen vehicle by the authorities as well as the motor vehicle bureau. When a rotisserie restoration or full body paint is done, all the tags are removed and replaced upon completion of the restoration. Selling your fender tags just opens a can of worms because those tags are trim numbers, paint, options and partially vin numbers.