Suffice it to say, an executor who knows that his coexecutor is committing breaches of trust and not only fails to exert efforts directed towards prevention but accedes to them is legally accountable even though he was acting on the advice of counsel (Matter of Westerñeld, 32 App Div 324, 344; 3 Scott, Trusts [3d ed], § 201, p 1657). When confronted with the question of whether to enter into the Marlborough contracts, Levine was acting in a business capacity, not a legal one, in which he was required as an executor primarily to employ such diligence and prudence to the care and management of the estate assets and affairs as would prudent persons of discretion and intelligence (King v Talbot, 40 NY 76, 85-86), accented by "[n]ot honesty alone, but the punctilio of an honor the most sensitive” (Meinhard v Salmon, 249 NY 458, 464, supra). Alleged good faith on the part of a fiduciary forgetful of his duty is not enough (Wendt v Fischer, 243 NY 439, 443). He could not close his eyes, remain passive or move with unconcern in the face of the obvious loss to be visited upon the estate by participation in those business arrangements and then shelter himself behind the claimed counsel of an attorney (see Matter of Niles, 113 NY 547, 558; Matter of Huntley, 13 Misc 375, 380; 3 Warren’s Heaton, Surrogates’ Courts [6th ed], § 217, subd 3, par [b]).
Further, there is no merit to the argument that MNY and MAG lacked notice of the breach of trust. The record amply supports the determination that they are chargeable with notice of the executors’ breach of duty.
The measure of damages was the issue that divided the Appellate Division (see 56 AD2d, at p 500). The contention of Reis, Stamos, MNY and MAG, that the award of appreciation damages was legally erroneous and impermissible, is based on a principle that an executor authorized to sell is not liable for an increase in value if the breach consists only in selling for a figure less than that for which the executor should have sold. For example, Scott states:
"The beneficiaries are not entitled to the value of the property at the time of the decree if it was not the duty of the trustee to retain the property in the trust and the breach of trust consisted merely in selling the property for too low a price” (3 Scott, Trusts [3d ed], § 208.3, p 1687 [emphasis added]).
"If the trustee is guilty of a breach of trust in selling trust property for an inadequate price, he is liable for the difference