Dan Penteado's legal team said he committed the fraud because he was on a short-term contract and made the "very poor judgment not to interrupt the flow of housing benefit".
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Addressing an audience in America, the former PM said of Europe's single currency that it was not working "as intended".
The countries lawmakers voted to impeach President Park Geun-hye in the wake of mass protests against her.
The former presidential candidate, who has herself been the target of false news reports, said such stories had 'real-world consequences'.