An merchandise which contains reproduced pictures of our banknotes in a means that doesn't meet our copy problems can be copyright and could cause prosecution under UK legislation: Forgery & Counterfeiting Act 1981 (Aspect II) – even where things are printed with more textual content like ‘Film’ ‘Prop’ ‘Teaching’ etc. https://legitsdocsolutions.com/product/copyright-50-usd-bills/