Ms Duffield had always “strenuously denied” the allegations.
Posting on X, formerly Twitter,, external the MP said: “The Labour Party placed me under investigation last year under allegation – which I strenuously denied – of antisemitism and transphobia.”
She continued: “Immediately before Christmas, I was informed that the existing allegations, which had been confirmed by the party to The Sunday Times, had been dismissed by the NEC: there was no case to answer, and nothing I had done had breached any Labour party rule.
“I was completely exonerated.”
The Labour Party has been approached for comment.