Swiss authorities say evidence has been seized in a search at the French soccer federation headquarters for their criminal case against former FIFA president Sepp Blatter.
The office of Switzerland's attorney general on Wednesday said the governing body for French soccer consented to the search carried out Tuesday with the cooperation of the French Financial Prosecution Office.
Criminal proceedings were opened against Blatter last September for suspected financial mismanagement over a $US2 million ($A2.68 million) payment he approved from FIFA funds for Michel Platini in 2011.
"Documents were seized in connection with the suspected payment," the Swiss federal prosecution office said in a statement, which detailed a formal request for help from French authorities on January 14.
Blatter and Platini were both banned from soccer for six years after an investigation by FIFA's ethics committee. They are appealing against their sanctions at the Court of Arbitration for Sport.
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Both men have constantly denied wrongdoing and claimed they had a verbal deal for additional salary that former France great Platini would receive for working as Blatter's presidential adviser from 1999-2002.
Before the payment was revealed in September, Platini had been the leading candidate to succeed Blatter as president in FIFA's emergency election on February 26.
