Fixed deposit Mode is Either Survivor

please write facts cogently.

All I could understand that

1. your father died
2. your father had on FD in which you are either or survival joint holder
3. original FD is with brother.
4. Brother has no stake or right in said FD.

please stated if it is correct

Yes Sir,all points are right...

 Every depositor is expected to preserve the FDR carefully. On due date depositor(s) is/are required to discharge on the FDR with a view to getting payment of maturity proceeds either in cash or by crediting his/her/their Savings Bank/Current Deposit Account with the same branch. Convince your brother and grab it.

Yes sir I know that,also I have detailed fd statement.....kindly give ur suggestion ...what I doo next..?

There are two ways.  One is to settle the matter amicably by involving elders who can convince him that his act is not justified and it has to be returned to you. 

The other way is to threaten him that you will lodge police complain for holding the FDR illegally.

Third one is convince the bank that you will an indemnity for issuing a duplicate FDR along with another guarantor. 

Madam, 

You may  put an request appeal with the Banker not to disburse the payment of FDs on maturity  or any loans since you are also a legal heir for the amounts.  And also attach your father's death certificate copy to the letter.