Ubs, sued for $2 billion by the trustee liquidating Bernie Madoff’s defunct firm, said the trustee would have “carte blanche” to disclose confidential material to 4,000 parties including rival banks under proposed changes to his current rules of privacy.

Trustee Irving Picard, who is filing hundreds of lawsuits seeking $100 billion for investors in the Ponzi scheme, has asked a judge to give him more freedom to use information supplied for his investigations.

Names and account numbers of Madoff customers, amounts of withdrawals, redemptions, transfers and transferees would lose their protection, UBS said in a filing in Bankruptcy Court in Manhattan.

Picard’s proposal would “permit the trustee the unfettered right to disclose UBS’s confidential information to more than 4,000 parties, including some of UBS’s direct competitors,” the Swiss wealth-management bank said in a court filing. A Picard spokesman didn’t immediately respond.

Picard sued UBS in November, alleging it aided the Madoff scam by agreeing “to look the other way” and pretend it was guarding real assets.