PARIS (Reuters) - French media giant Vivendi (VIV.PA) will file a formal notice informing Italian authorities that it exercises "management and coordination" over Telecom Italia (TLIT.MI) but not control, a French source close to the matter said.

That would contradict Italy's market watchdog which ruled on Wednesday that Vivendi, which owns a 24 percent in the Italian group, had de facto control.

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Should the Italian government decide Vivendi does have de facto control it may conclude the preconditions exist for it to exercise "golden powers" which could range from a fine to imposing conditions or vetoing decisions Rome considers a threat to national interests.

(Reporting by Gwenaelle Barzic; Editing by Richard Lough)