Missing FD Documents – What to do?

Hi,
My mother has done about 5 Fixed Deposits with Andhra Bank for which we are unable to get the Fixed Deposit Slips. The Bank people has given the details of the Fixed Deposit numbers and amount but not giving the details of the Nomiee or the process to withdraw it. We have other Fixed Deposit slips with us but we are not able to find these 5 slips..How to go on and withdraw these slips as the amount is big one..

Thanks in Advance
Naveen