No, because that's not how any of this works, even when you're a child.
It's well established that obvious mistakes are obvious mistakes and you don't get to profit from them. Brigade either had a very dumb lawyer or they were having a really bad cash-flow problem and wanted this money to cover their issues...
Sounds like quite a canny lawyer to me!
* no discussion of scibeners errors
* no mention of the effect on citi of being forced to buy 900m in bonds/debt they never consented to buy
* no discussion of the chilling effect on the wider credit system
* no discussion of why all the other creditors returned their payment without issue
"Should this money be returned" is a fair and interesting question. The answer is Yes and for a long list of reasons. But the article picks a single one, a technical one and the example used is a bit weak. Theres still a lot of meat left on these bones imho :)