Interpreting what defines “substantial harm” to a prospective client when determining if an attorney should be disqualified, a unanimous appellate panel reversed a Commercial Division ruling that disqualified an attorney based on Rule 1.18, which was added to the Rules of Professional Conduct (22 NYCRR 1200.0) in 2009.

In a nine-page opinion by Justice David Saxe (See Profile) of the Appellate Division, First Department, the court held that even though the attorney in question had imparted confidential information gained from a prospective client that was “likely to be detrimental” to the client, “disqualification is not warranted because the conveyed information did not have the potential to be significantly harmful.”

Ruling in Mayers v. Stone Castle Partners, 650410/2013, Saxe said the prospective client who sought the disqualification had later made the confidential information known to his adversary, and thus the disclosure did not reach the level of “significant harm” required by the rule.