A former client of Sonnenschein Nath & Rosenthal who fell victim to Bernard Madoff has agreed to pay $650,000 to settle a fee dispute with the law firm.

The settlement, whose terms were filed in Manhattan Supreme Court last week, is about 20 percent less than Sonnenschein had originally sought from Elaine Stein when it sued her in December 2009. Sonnenschein had represented Ms. Stein in a dispute with one of her sons over control of her assets.