"Food fraud and counterfeit cotton: the detectives untangling the global supply chain"
While not an unknown subject, it is an article well worthwhile reading (long).
Brazilian sugar getting turned into EU origin.....easy, unload Brazilian origin sugar from the front of the vessel, touch down on EU soil, reload EU origin sugar at the back.
Italian olive oil.....try Ukrainian sun oil !!
Scams all over the place, it's easy to change origin if you know how !