After discovery disputes about the confidentially of internal firm documents, Simpson Thacher & Bartlett has settled a recruiter’s lawsuit that claimed the law firm failed to pay a placement fee for recruiting a former Sullivan & Cromwell partner.

“The action has been settled on confidential terms,” said Boston Executive Search Associates’ attorney, Douglas Salvesen, of Boston-based Yurko, Salvesen & Remz, in a statement to ALM Wednesday.