Attorney-Client Privilege Defined A. New York State New York codified the attorney-client privilege in CPLR 4503, which provides: New York law holds that privileged persons include the client or prospective client, the attorney, and agents of the client and attorney.Maintaining attorney-client privilege when working with third-party consultants can be tricky. The attorneyclient privilege shields from disclosure any confidential communications between an attorney and his or her client. The principle that the attorney-client privilege attaches to third-party consultants also has been applied to representatives of the attorney, such as. The attorney-client privilege belongs to the client, which is the company, not its employees. If the purpose is legal advice, the communication is privileged if it's confidential and between lawyer and client. One final consideration arises in the context of in-house counsel. First, client consultants are within privilege if they are deemed essential to allow communication between the attorney and the client. Such communications concerning the particular matters addressed in the disclosed communications.