Hi Sagar,
Have you fulfilled employment contract and its terms and condition? or Have you implicated yourself in any domestic inquiry, which is related to Discipline?
These are the vital question before leaving, because Prior Notice has to be given when you left the organization with clearing all accounts.and if there is any disciplinary inquiry pending against you than its very hard to left the organization.
If you have done prerequisite formalities for leaving,than No need to scared, do one thing, Send a register post regarding your due salary with all documents like last three month Salary slip, Bank Statement, their Acceptance letter or releasing letter and give minimum 15 days time for disbursing the due salary on your account and wait for 15 days. if they don't give your salary, organized The above documents with your registry post slip and may go to A.L.C State or Central but first you should check weather your establishment comes in State or central accordingly you make plan to go for Justice.
Have a Nice Day!