 Nazam-ud-Daulah was appointed as Mir Jafar's heir with the title of "Murshidzada Bahadur", by Mir Jafar himself on 29 January 1764.After the death of Mir Jafar Nawab Nazim Najm-ud-din Ali Khan succeeded him to the Nawab's throne under the titles of "Shuja-ul-Mulk" (Hero of the Country), "Nazam-ud-Daulah" (Star of the State) and "Mahabat Jang" (Horror in War) at the age of 15 on February 5, 1765; it was confirmed by the East India Company on February 23, 1765.This cost him ₤140,00, which was divided among the members of the Calcutta Council.