Radamel Falcao's loan move to Chelsea included an option to sign the Colombian permanently for a fee of more than £37 million (€50m), it has been claimed.
Website Football Leaks, which caused a stir this week by publishing details of Gareth Bale's world record transfer to Real Madrid, has struck again by publishing the details of Falcao's temporary switch to Stamford Bridge.
The Monaco ace has been a major flop this season, playing just nine league games and scoring once amidst reports that his move will be called short this month.
His failure comes less than a season after a similar flop while on loan with Manchester United, where he managed just four Premier League goals.
According to documents published on Football Leaks, if Chelsea wanted to make Falcao's move permanent they'd be obliged to fork out £18,922,164.04 (€25m) within seven days of the deal being ratified by FIFA, and the same again after the deal is complete. That would take the total amount paid for the 29-year-old to £37,844,328.07.
That is now of course highly unlikely to happen, and Falcao is currently sidelined through injury, which means he may well have played his last game for Chelsea.
The emergence of Football Leaks has caused serious concern amongst the power brokers of the game, with Gareth Bale's agent Jonathan Barnett demanding an investigation into the website immediately. He said: 'There should be an independent investigation because it's outrageous.
"I think it's disgraceful people can get hold of this stuff. It shows complete disregard for both clubs and the player."
It has since been claimed this morning that Football Leaks is being investigated by police over a €1 million blackmail plot involving leading agency Doyen Sports.