Former Bari goalkeeper Jean-Francois Gillet, 34, is among those accused of "putting measures in place aimed at altering the performance and outcome" during Serie B defeats to Treviso and Salernitana in May 2008 and May 2009 respectively.
Belgium international Gillet represented Bari for 11 years before moving to current club Torino and could face a five-year ban from football if found guilty, while current Bari captain Francesco Caputo and former defenders Andrea Masiello and Marco Esposito are among the other high-profile players implicated.
Masiello has already been handed a 22-month suspended prison sentence after confessing to scoring a deliberate own goal in a Serie A relegation-decider against Lecce in May 2011.
A statement published on figc.it read: "The federal prosecutor has examined the evidence found by the public prosecutor of Bari and, after carrying out a preliminary disciplinary investigation, has referred 33 members to the national disciplinary committee.
"With regard to Bari-Treviso on May 11, 2008, 11 members (Belmonte, Bonanni, Esposito, Ganci, Gillet, Lanzafame, Rajcic, Santoruvo, Spadavecchia, Strambelli and Pianu) are accused of "putting measures in place aimed at altering the performance and outcome" and another eight (Cavalli, Donda, Galasso, Gazzi, Ladino, Marchese, Masiello and Stellini) for failing to report their knowledge.
"With regard to Salernitana-Bari on May 23, 2009, 19 members (Esposito, Stellini, Santoni, Masiello, Lanzafame, Gillet, De Vezze, Guberti, Kutuzov, Parisi, Galasso, Bonomi, Caputo, Colombo, Bianco, Edusei, Fusco, Ganci and D'Angelo) are accused of "putting measures in place aimed at altering the performance and outcome" and another two (Gazzi and Barreto) for failing to report their knowledge.
"Bari are referred due to their objective responsibility for members involved in the games in question."
Inter Milan and Italy defender Andrea Ranocchia was on loan at Bari in 2009 and played in both matches under current Juventus head coach Antonio Conte, but both men have been cleared of any wrongdoing.