BBC Sport are reporting that French club Nantes have demanded Cardiff City pay the £15 million transfer fee for Emiliano Sala.
Sala, Cardiff’s record signing, is feared dead after a plane travelling from Nantes to south Wales lost radar contact near Guernsey on January 21.
The Bluebirds have withheld the first scheduled payment until they are satisfied with the documentation.
Wreckage from the Piper Malibu was discovered in the English Channel this week after a privately-funded search began.
An underwater camera showed one occupant was visible in the wreckage.
Sala was on board the plane with pilot Dave Ibbotson.
BBC's report adds that Nantes are threatening legal action if they do not receive a payment from Cardiff within 10 days.
A source at the Welsh club says the contract will be honoured but not before Cardiff have clarified "all the facts".
Cardiff are "surprised" that Nantes have made the demand while recovery attempts are still being carried out.
The £15m fee is due to be paid in instalments over three years.
Bordeaux will also receive a percentage of the fee, thought to be 50 per cent, because Sala played for them from 2012-2015 before signing for Nantes.
Air accident investigators have confirmed that an attempt to recover the body found in the wreckage has begun.
The Air Accidents Investigation Branch (AAIB) is considering the feasibility of lifting the wreckage from the seabed if it can recover the body.
An AAIB spokesman said, per the Evening Standard: “We are attempting to recovery the body. If we are successful, we will consider the feasibility of recovering the aircraft wreckage.
“Strong tidal conditions mean we can only use the remotely operated vehicle (ROV) for limited periods each day and this will mean that progress is slow."News Now - Sport News