How to show a recent mutual fund and PF withdrawal to saving bank account in proof of funds.

[RobinSinghNanda]

I recently started collecting funds in my saving bank account. I made withdrawal from my mutual funds and EPF. Most of the money is very recent like one month old because of recent withdrawals. How can I prove that this money is mine to the case officer? Do I need to letters on letter head from all the mutual fund houses and EPF? Please help.