Should I give prior notice to lift a Fixed Deposit prematurely in NSB?

I went to NSB to lift a FD prematurely. Citing the year end and all the manager claimed that I cannot lift a FD prematurely without giving 7 day notice period. I have never read such rule in any of the other banks. Is this a valid requirement? Or the manager is trying to save their yearly target by delaying this? Can I do something about this?