How to pay additional fee, when $ 200 is already paid

[sammy_2401]

I see the fee has now increased to 400. I had already paid $200/-, but not yet posted the application. Now is it OK if I pay another 200$ and attach the two payment receipts together. Or do I need to cancel the one paid earlier, get refund for that and pay a full $ 400 now.

Thanks in advance.

 

[Rigly68]

https://eservices.cic.gc.ca/epay/order.do?lob=1

There is a line where it says: Fee difference for adult grant of citizenship (if you already paid $200)