Blank fender tag.

A friend had a car MANY years ago that had a rattle. The dealer searched and searched but could not find it.

The guy finally decided to take matters into his own hands.

He started cutting into body panels near where he heard the rattle.

Sure enough he found the rattle and a note laughing about the rattle.

The belief was that an assy line worker wrote the note and stuck it to a piece of metal and put inside the body panels before they were welded together.

I don't know if it was a tall tail but it was told to me as a true story!