under the payment of bonus act, even if you leave before the payout of bonus, but you have served for atleast 30 days in that financial period, then you are eligible for bonus payment. The Management is legally liable to pay you the bonus for the the financial period & even pay to left employees on pro rata basis.... they should have your address, they are legally bound to pay you ... however unfotunately, many indian corporates avoid paying to left employees.... They are also legally required to submit Form C with details of Bonus payout....
By the way what is your Basic Salary, Gross Salary.... Are you under the bracket of eligibility of Bonus under the provisions of Bonus act... if yes, then as per labour law you must get it.... You demand for it from HR.... they are legally bound
Best wishes, Rajesh Satyal