I attend interview on 2nd April 2016 in Bangalore Office And clear all the Rounds and i got the Offer letter on 8th of April and After that i received a call regarding my passport and PAN card,I told them I will be submitting on the time of joining, on 21 of April i got a mail from CTS stating that i'm not not shortlisted ,they have not mentioned any Reason on that mail ,it such Bad Experience for me , how Can i rejected After issuing the offer letter ,Can any one help to how to Take Legal Action for this