Last month it emerged that Barca have paid Negreira and a company he owns a reported total of 8.4m euros (£7.4m) between 2001 and 2018.
BBC reports a Barcelona court heard on Friday that Barca, former club officials and Negreira had been indicted for "corruption", "breach of trust" and "false business records".
These lawsuits, brought by the Barcelona public prosecutor's office, target the club, as well as former presidents Josep Maria Bartomeu and Sandro Rosell.
