New South Wales Premier Barry O'Farrell has resigned after giving evidence to the Independent Commission Against Corruption that he did not receive a gift of $3000 Grange wine from Australian Water Holdings.
Mr O'Farrell told reporters a thank-you card signed by him for the gift has emerged.
He said he did not recall and could not explain the note.
The Premier said he yesterday gave evidence to the commission to the best of his knowledge and believed it to be truthful.
"In no way did I seek to mislead, willfully or otherwise, the Independent Commission Against Corruption," he said.
"This has clearly been a significant memory fail on my part."
He told reporters he accepted the consequences of his actions.