Thanks just watched the provided youtube video. Interesting case. Less greedy and it would have worked perfectly. As someone with 0 idea about the art world it was really interesting to see how well an approach of "fake the history by altering the archives" + medium skill level painting worked. The lady that flew in from France basically already told them "these are pretty bad forgeries" and got the reply "yeah but the documents are legit" and had to go through all kinds of trouble to prove the documents are fake.

In my worldview these scams only worked with perfect and amazing forgeries that require some sort of high tech color-analysis and canvas analysis to uncover...alas just faking the chain of trust worked quite well.