When practitioners in Legal Malpractice stay in the area long enough, older cases they handled come back to save or haunt them. A prime example isDeNatale v Santangelo ; 2009 NY Slip Op 06398 ;; Appellate Division, Second Department . Here the defendant law firm wins dismissal based upon a now well known case. In that case, defendant attorney lost the motion and the appeal, here, based on the same law, defendant attorney wins.
 

The case in common is Barnett v Schwartz ;2007 NY Slip Op 09712 [47 AD3d 197] . Important language there: "The elements to be proved in a legal malpractice action have been subjected to various formulations. Thus, while it is clear that a plaintiff-client must prove negligence (i.e., that the defendant-attorney failed to exercise that degree of care, skill, and diligence commonly possessed and exercised by members of the legal community), some cases hold that the negligence must be "the" proximate cause of damages (Britt v Legal Aid Socy., 95 NY2d 443, 446 [2000]; see e.g. Kleeman v Rheingold, 81 NY2d 270 [1993]; Caruso, Caruso & Branda, P.C. v Hirsch, 41 AD3d 407 [2007]; Cohen v Wallace & Minchenberg, 39 AD3d 691 [2007]; Cummings v Donovan, 36 AD3d 648 [2007]; Kotzian v McCarthy, 36 AD3d 863 [2007]), while others hold that it must be "a" proximate cause of damages (Bauza v Livington, 40 AD3d 791, 793 [2007]; see e.g. Moran v McCarthy, Safrath & Carbone, P.C., 31 AD3d 725 [2006]; Terio v Spodek, 25 AD3d 781 [2006]; Pistilli v Gandin, 10 AD3d 353 [2004]). There are also cases from this Court requiring the damages to be a "direct result" of the negligence (Caruso, Caruso & Branda, P.C. v Hirsch, 41 AD3d 407, 409 [2007]; Kotzian v McCarthy, 36 AD3d 863 [2007]; Moran v McCarthy, Safrath & Carbone, P.C., 31 AD3d 725 [2006]). In the main, the cases from the Court of Appeals, including the most recent, do not expressly require that the negligence be either "the" or "a" proximate cause of damages, but require proof that, "but for" the negligence of the defendant-attorney, the plaintiff-client would have prevailed in the underlying action (in a classic lawsuit-within-a-lawsuit scenario) or would not have incurred damages (in an action alleging negligent advice, etc.) (see e.g. Leder v Spiegel, 9 NY3d 836 [2007]; Rudolf v Shayne, Dachs, Stanisci, Corker & Sauer, 8 NY3d 438 [2007]; AmBase Corp. v Davis Polk & Wardwell, 8 NY3d 428 [2007]; Davis v Klein, 88 NY2d 1008 [1996]; Carmel v Lunney, 70 NY2d 169 [1987]). The defendants here, while not expressly describing the difference between proximate and "but for" causation, argue that the latter requires a greater, more direct degree of causation. However, we find no substantive{**47 AD3d at 204} import to the variations in the formulations discussed above, and hold that a plaintiff-client in a legal malpractice action need prove only that the defendant-attorney’s negligence was a proximate cause of damages. "

"Moreover, our reading of the case law does not reveal that a heightened standard for causation is actually being applied in legal malpractice cases. Rather, all results can be explained by application of general principles of proximate cause.""In sum, regardless of the formulation employed, a plaintiff in a legal malpractice action need prove only that the defendant-attorney’s negligence was a proximate cause of damages. "