Cardiff City Football Club will launch an appeal after they were ordered to pay French club Nantes more than £5m in relation to the signing of Emiliano Sala.
The Argentinian died when the aircraft he was travelling in from France to the UK to complete his move to the Welsh side crashed in the English Channel.
The Bluebirds had argued they could not be held liable for the £15million fee because Sala had not registered as a Premier League player.
The club said they were ''extremely disappointed'' by a decision by FIFA to award Nantes £5.3m - the equivalent to the first instalment of that fee. They said there remains ''clear evidence the transfer agreement was never completed.''