Funds transfer

According to me yes it is necessary for all foreign remittance.

Currently, remittances to non-residents are allowed by banks if the person making the remittance furnishes an undertaking, accompanied by a certificate from a Chartered Accountant (“CA”) certifying the rate for withholding tax as per section 195 of the Act. The banks then forward the certificates to the Reserve Bank of India (“RBI”), which in-turn forwards it to the Income tax department.