A probate petition is filed to get the will of a deceased person certified by the court.
The matter came up before Justice R D Dhanuka, who granted time to both the sides for filing additional documents.
The legal dispute between the brothers is over the distribution of family property which includes bank deposits and Thackeray's bungalow 'Matoshri' in suburban Bandra.
But the probate petition of Uddhav has been now converted into 'a testamentary suit' as Jaidev, who has not been left any share in the property by the will, has opposed it.
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Bal Thackeray's estate, as per the will, includes property and bank deposits, collectively worth Rs 14.85 crore.
Jaidev, the estranged son of Thackeray, has contested the will, saying that the property is worth much more, and the bungalow itself is worth Rs 40 crore.
But it gives no share to Jaidev and Madhavi, the widow of Thackeray's eldest son Bindumadhav who died in a road accident some years ago. Madhavi has not contested the will.
Former Sena MP and senior advocate Adhik Shirodkar, lawyer Anil Parab, architect Shashi Prabhu and Ravindra Mhatre, former personal assistant to the late Sena supremo, have been named executors of the will. Dr Jalil Parkar, his personal physician, is the witness in whose presence Thackeray signed the will.