The 46-year-old, who was also Fifa's financial chief, was fired with immediate effect on May 23rd after the discovery of a secret bonus scheme that paid out millions of dollars over a period of years.
Football's scandal-plagued ruling body revealed in June that former president Sepp Blatter, ex-secretary general Jerome Valcke and his successor Kattner had skimmed off $80 million in “a coordinated effort” to “enrich themselves” between 2011 and 2015.
“Mr Kattner has begun legal proceedings before the competent court in Zurich as he believes his dismissal to be unfair,” a source close to Blatter's former right-hand man told AFP.
“Since his dismissal in May, Mr. Kattner has not received any reason from Fifa justifying his dismissal without notice,” the source continued, adding that the payments that the German had received were “compliant with Fifa's code and approved by the compensation committee”.
Contacted by AFP, Fifa said they had “not received any information” concerning the action taken by Kattner at the labour court in Zurich.
CORRUPTION
Sacked Fifa executive hits back in Zurich court
Fifa's disgraced former secretary general Markus Kattner has begun legal action to challenge his "unjustified" sacking, a source close to the German told AFP on Tuesday.
CORRUPTION
Barçagate: Police raid FC Barcelona offices and arrest former president
Police raided the offices of FC Barcelona on Monday, carrying out several arrests just six days ahead of the club's presidential elections, a Catalan regional police spokesman told AFP.
Spain's Cadena Ser radio said one of those arrested was former club president Josep Maria Bartomeu, who resigned in October, along with CEO Oscar Grau and the club's head of legal services.
But the police refused to confirm names, saying only “arrests are taking place” and adding that the operation was being run by officers from the financial crimes unit.
“We are in the process of carrying out an operation right now with agents of the financial crimes unit,” the police spokesman told AFP.
According to reports in the Spanish media, the operation is linked to last year's investigation into the 'BarçaGate' scandal, which saw the club deny hiring a company to criticise current and former players on social media to improve the image of the then-president Bartomeu.
Cadena Ser said Barca paid €1 million in six separate invoices to the company I3 Ventures, with whom the club have since cut ties.
Bartomeu resigned in October, after mounting pressure following months of controversy and a dramatic decline in performances on the pitch.
His successor is due to be elected on Sunday, when club members will choose between the final three candidates, Joan Laporta, Toni Freixa and Victor Font.
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