I gather that the Nobel Prize does not convey a tendency for honesty.
"[Machado] claimed her party's candidate, Mr Gonzalez, won by a landslide and Ms Machado said she could prove this because she had receipts from more than 80% of polling stations."
Yes, the opposition claimed that it had proof. However, it has not allowed any independent third parties to verify said proof. That she won a peace prize is inconsequential. They gave one to Henry Kissinger too.
"[Machado] claimed her party's candidate, Mr Gonzalez, won by a landslide and Ms Machado said she could prove this because she had receipts from more than 80% of polling stations."