As "F&F Settlement" pertains to the act of payment of dues which are mostly legal to an employee by the employer on the termination of his employment, I think that whatever policy an employer can have in this regard should not run counter to the statutory provisions governing the respective components of the terminal benefits.
For example, if gratuity forms part of the F&F, it should be paid within 30 days from the actual date of termination.
If it is wages/salary for the period worked, it shall be paid on the last working day. Strictly speaking, the same condition applies to the payment of notice pay to an employee if the cause for termination entitles him to that. Other dues like encashment of leave etc., would also require immediate disbursement as soon as termination of employment becomes effective. Only statutory bonus payable for the period of service rendered prior to the date of termination could be paid on the close of the Accounting Year for which the percentage of bonus is yet to be decided.
In fine, the process of F&F Settlement should be completed within 30 days from the actual date of termination of employment depending upon it's nature.
27th August 2019 From India, Salem