Cardiff City paid the first installment to the French club Nantes for the transfer of Argentine footballer Emiliano Sala, who died in a plane crash four years ago.
The Welsh claimed that the 28-year-old Sala was not officially their player when he died and refused to pay about 15 million euros in compensation.
The Argentine was already in Wales, underwent medical examinations, and signed a contract, but returned to France to say goodbye to his former teammates. He died on the way back to Wales.
FIFA then punished this club with a transfer ban for the next three transfer periods, and then the Welsh appealed to the Court of Arbitration for Sport (CAS).
A three-member panel of the CAS heard the appeal in Lausanne at the end of last year and decided that Cardiff must pay compensation.
The Welsh have now paid the first part, which is speculated to be around seven million euros. However, Cardiff also filed an appeal against the CAS verdict to the Swiss Federal Court, and the verdict is expected in February this year.