When Falsacappa asks for the money it emerges that the treasurer has squandered the dowry. Falsacappa is furious, but just then the Mantuans, swiftly followed by the Granadans abandoned at the inn, arrive, along with the carabineri. The real princess introduces herself. The brigands admit who they are but when Fiorella enters in her costume from Act 1 and reminds the Duke that she saved him from the brigands, he agrees to an amnesty and they swear to lead good lives from then on.