French football club Nantes has reportedly demanded the first transfer payment from Cardiff City for Emiliano Sala, who died after his plane crashed over the English Channel last month.
BBC Wales reports that the Ligue 1 club is demanding an initial payment of £5m (NZ$9.4m) be transferred within the next 10 days or they'll take legal action.
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Cardiff has not yet paid any of the £15m (NZ$28m) fee for the Argentine striker, as they wait for the investigation into the missing plane to finish.
A source at Cardiff says it will honour the contract, but not until they have clarified all the facts.
Sala and pilot David Ibbotson were on board the Piper Malibu aircraft that went missing over the English Channel on January 22 (NZ time), carrying the player from Nantes to Cardiff for his first training session with the team.
The wreckage of the Piper Malibu aircraft was found at the bottom of the sea this week, although no victims have yet been identified.
"We are attempting to [recover] the body," says Britain's Air Accidents Investigation Branch (AAIB). "If we are successful, we will consider the feasibility of recovering the aircraft wreckage."
Strong tides have hampered the recovery mission.