Cardiff City has been told by the FIFA Players' Status Committee to pay Nantes €6million for the late Emiliano Sala.
The striker became Cardiff's record signing when a deal was struck with the Ligue 1 club in January.
But before he made an appearance for City, the plane carrying Sala from France to Wales crashed and he was killed, along with pilot David Ibbotson.
Cardiff claimed the agreement to pay Nantes a £15million fee was not legally binding because conditions insisted upon by Nantes were not fulfilled.
The FIFA Players' Status Committee said on Monday the €6m Nantes should receive from Cardiff is "corresponding to the first instalment due".
A statement read: "The FIFA Players' Status Committee, which never lost sight of the specific and unique circumstances of this tragic situation during its deliberations on the dispute at stake, refrained from imposing procedural costs on the parties.
"The findings of the decision were notified to the parties concerned today."
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