To maintain the specified balance in your account, the bank may liquidate FD units using either the FIFO (First In First Out) method or the LIFO (Last In First Out) method. In the LIFO system, the bank will liquidate the FD units in which you most recently invested, and the amount will be deposited into your account. Whereas under the FIFO system, the FD units that were created the earliest will be liquidated by the bank.