You should add a nominee to mitigate money transfer worries in any case of unfortunate scenarios. Such as the death of the deposit holder. For now, adding a nominee is optional, but highly recommended. You can only add a nominee at the time of deposit creation. Editing it later is not possible just yet. If you do not add a nominee, then your Savings Account nominee (when you signed up on Fi), can claim your savings from Federal Bank by producing an heirship certificate.