Haller payment deferred until 2022
The latest revelation suggests the Hammers had already paid 50 per cent of the Haller fee after the sale of Mark Arnautovic to Chinese club Shanghai SIPG for £20.4m in 2019.
The outstanding debt originally owed to German club Frankfurt was sold to investment company MSD Capital.
Haller joined West Ham for a club-record £45m in 2019 but the fee was to be repaid in instalments over five years.
West Ham exercised their right to pause some of the remaining payments. FIFA then launched an investigation, which was settled by Eintracht selling the debt on to MSD.
The New York-based company was founded by computer tycoon Michael Dell of the computer firm fame.