It is well settled that to establish a cause of action for legal malpractice, “a plaintiff must demonstrate that the attorney failed to exercise the ordinary reasonable skill and knowledge commonly possessed by a member of the legal profession and that the attorney’s breach of this duty proximately caused plaintiff to sustain actual and ascertainable damages.” Rudolf v. Shayne, Dachs, Stanisci, Corker & Sauer, 8 NY3d 438 (2007), quoting McCoy v. Feinman, 99 NY2d 295 (2002), “To establish causation, a plaintiff must show that he or she would have prevailed in the underlying action or would not have incurred any damages, but for the lawyer’s negligence” Rudolf at 442; Fireman’s Fund Ins. Co. v. Farrell, 57 AD3d 721 (2d Dept. 2008).
The four elements of legal malpractice, put more simply, are: departure, proximity, ascertainable damage, and the “but for” element. The defense of a legal malpractice action may take place on any of the four elements set forth. Was the behavior of the attorney a departure from the degree of skill and care? Was the departure a proximate cause of the damage? Was there one or more than one cause of the damage?