Contemporary forgery of a banknote as illustration

Is it acceptable to use an image of a contemporary forgery of a banknote when no example of a genuine note is known to exist?

This is the case of some British Isles banknotes from the early 1800s and earlier.

You can put it as an example with the ‘Fake/counterfeit item’ box checked but I wouldn't use it as a main example.

Yes, as Idolenz said. It could be misleading, even though there are no known examples.

OK. Thanks for that clarification.