It would be a fraud only if represented as being original NO. When you restore a car, you are doing exactly that - restoring it. It's not "original" anymore.
If one subjects a legitment car to a rotessory restro including replacing trunk/floor pans, 1/4's, fenders, interior etc. ...... Would that car be concidered a fraud ....? NO, because you are replacing panels that do NOT contain VIN information/stampings. If so then there are a bunch of fradulant cars out there.
It's not uncommon for the tags & numbers on restorations of this level to be removed and reinstalled. Not legally, anyway...If reinstalled on a different but identical and original panel ..... is this a fraud....? YES! If it contains VIN or partial VIN stampings, absolutely!
Like I said, it's a tricky subject. No, it's not, it's a matter of legality and ethical behaviour. Not really illegal unless represented as being original. Show me a state law that says this. But then even a moron can detect a redone car as not being a survivor.