The complaint also notes that Cohmad paid more than $500,000 to Sonya Kohn, the head of Bank Medici, an Austrian private bank whose customers incurred substantial losses in the Madoff collapse.

Several Cohmad figures have come under heavy scrutiny since Mr. Madoff’s arrest, notably Mr. Jaffe, the firm’s vice president, who was accused of introducing a number of investors into Mr. Madoff’s firm. Mr. Jaffe himself lost money with Mr. Madoff.