Joint Registrar Pankaj Gupta issued notice to Kejriwal asking him to respond why the defamation proceedings against him should not be initiated.
He fixed July 26 as the next date of hearing in the matter, by when Kejriwal has to file his response.
Jaitley, who holds twin portfolios of Finance and Defence, filed the second defamation suit after Jethmalani allegedly "abused" him in open court during the proceedings of another defamation suit he had filed against the Aam Aadmi Party (AAP) chief and five other party functionaries.
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