Booking full refund ticket – what fee will be charged?

I am trying to book a Finnair Economy PRO ticket and I see it offers full refund for cancellation. I am trying to book using internet banking or debit card, will there be any other (hidden) fee charged even though it mentions full refund for the cancellation. I am choosing this option as I may most likely cancel this ticket. So I am looking for an option which gives me complete amount which I am spending.

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