The decision, handed down by a New York Appeals Court in Manhattan, states that he be “disbarred from the practice of law, effective immediately, and until the further order of this court, and his name stricken from the roll of attorneys and counsellors-at-law in the state of New York”.

Mr Giuliani was suspended by New York radio station WABC in May for using his show to state that Mr Trump had lost the 2020 presidential election due to electoral fraud.

John Catsimatidis, the billionaire Republican owner of WABC, said Mr Giuliani had been “warned” to not discuss lies about the election.

“We’re not going to talk about fallacies of the November 2020 election. We warned him once. We warned him twice. And I get a text from him last night, and I get a text from him this morning that he refuses not to talk about it … So he left me no option. I suspended him,” said Mr Catsimatidis.