Originally Posted by blaise
It could be laundered by Madrigal, but Walt would have to launder it himself to show how he got it, right? I'm guessing Madrigal would have to launder it just to get it all USD, but once Walt has it he has no way to show it's clean for him.
Exactly. Since Walt has no connection to Madrigal, whatever they did prior to him receiving it is irrelevant.