Ali's Letter (2014)

The movie chronicles the devastating impact of the 1948 riots on Muslims in and around Hyderabad, India. The film is set in the 1950's. It narrates the story of Ali who has been ostracized by the rest of the village based on his religion. Ali is waiting for a letter, for which he bribes the post office clerk. The letter eventually arrives, but the clerk keeps the letter. What is this letter?