A person who commits fraud; someone who deliberately deceives others for money or personal gain.
From 'fraud' (from Latin 'fraus', deceit) + '-er' (one who does something). This agent noun directly indicates the person performing fraudulent acts.
While 'fraudster' became more popular in modern English, 'frauder' persists in legal documents—it's a reminder that English often creates multiple agent nouns for the same profession.
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