I am about to make two bookings, as I understand from the Business Full Flex rules they are 100% refundable except the 30,- booking fee. My question is if that also applies if you have checked in and received BPs, as we are waiting for a third person for a IC flight, we would like to have a backup in case he doesnt make the connection, so would it be safe to buy two Full Flex tickets, check in (no luggage though) and then cancel it if he is a no show and then use our second pair of later tickets?

Thanks for any kind suggestions