Originally Posted by
coolpoker
This is super annoying. But good to be aware of it so that correct FFN is always added at the time of making the booking. But this must be possibly issue when booking award flights with Avios. One has to be logged in under QR account and I am not sure if there is possibility adding other FFN there when making the award booking...
An option in that case might be to transfer the avios and book the award at BA, and then change the FF number afterwards at finnair.com