in this case, the underlying transaction was, as far as I can remember, completely benign - the problem was the person who decided to send 300M into what was obviously-by-then a black hole. What I can't remember is whether that payment was an amount owed to Lehman (in which case the bankruptcy trustee would have claimed it anyway, just a bit later) or if it was some kind of drawdown (in which case the German bank would have had a legitimate reason not to let it happen once Lehman was bankrupt, and it traded good money for a one claim among a very large number of similar claim for Lehman's shrinking assets).

In the long run, we're all dead. John Maynard Keynes