FAKES !! Someone in Europe is making fakes which are incredibly close to actual US plates, but they are easy to spot
beacuse they are not reflective, and any stickers are screened as part of the plate - they are not really stickers.
Also, there are bolt slots rather than holes on the fakes.
 
I have seen three fakes of NJ plates available on eBay.

The FAKE
New Jersey Fake License Plate Wilidlife

A REAL Wildlife plate



The FAKE
New Jersey Fake License Plate Liberty State Park

A REAL Liberty State Park plate



The FAKE
New Jersey Fake License Plate Battleship NJ

The REAL one (from my collection)


Yes, I know the number of the fake BATTLESHIP NJ plate is exactly the same number as a plate in my collection.
No, I did not supply a plate so that someone could make duplicates from it.
(New Jersey plates come in pairs, so I imagine that the mate to my plate was used as the source.)

A fellow collector in Europe saw the fake BATTLESHIP NJ plate for sale, noticed the number matched mine, and kindly sent it to me as a novelty.