> An interesting part of Madoff recoveries were through settlements against originators/feeder funds because they « ought » to have known it was a ponzi.

Did the judge say that? I would think the logic was that they were effectively getting stolen money as gifts. Like when a scammer gives their victims' money to their own family. Doesn't matter if they were in the dark or even spent it already.

As I understand it, if stolen/scam money is used to buy something it's not the seller's responsibility because money is legal tender. On the other hand, if a stolen item is sold, the issue of knowing where it came from does becomes important.