I paid the main application fee $550 online first and obtained a receipt. I have not mailed my application yet. Then I read if I didn't pay RFRF fee upfront and wait for CIC to contact me to pay the fee, my application may get delayed. So can I make another online payment for RFRF ($490) and include 2 payment receipts (1 for $550, another one for $490)in my application package? Thanks!