RIO DE JANEIRO - Brazil's state prosecution service has called on tax authorities to probe the controversial transfer of star striker Neymar to Barcelona from Santos.
The details surrounding the deal have already led to the resignation of former Barca chairman Sandro Rosell and sparked a judicial wrangle in Spain.
The transfer cost an initial reported 57 million euros ($F147m), plus a two million euros ($F5.1m) bonus if the 21-year-old star makes the finals of the FIFA World Player of Year award.
But various add-ons take the deal to a total 86m euros ($F222m) — including a reported 40m euros ($A103m) for N&N, Neymar's family firm run by his father.
Neymar senior has denied signing a pre-contract with Barcelona until his son had left Santos for the La Liga giants — but admitted receiving 10 million euros ($F25.7m) in 2011 to guarantee a move by 2014.
The player eventually moved a year early, joining the Catalan club before the start of this season.
Brazilian authorities are now putting the case under the microscope.
"Following new information on the true value of the sale of the player, the prosecution service has asked for elements from the treasury," the prosecutor's office said in a statement.