If it was a real check, legally, then the bank should've been able to collect from the get-rich-quick company. So if he had kept the "bank's" money, wouldn't he

If it was a real check, legally, then the bank should've been able to collect from the get-rich-quick company. So if he had kept the "bank's" money, wouldn't he really have been keeping the spammer's money, being that the bank would just have collected from the spammer?