Key legal question
Whether the plaintiff is personally liable to the defendant under trust liability for failing to warn against the proposed tax-optimization transaction.
Extracted holding
No trust liability arises on these facts because the defendant's protected trust arose from her contract with C. AG, not from any personal assurance by the plaintiff.
Extracted reasoning
Where a contract already governs the relationship, trust liability is exceptional and subsidiary. The defendant had contractual remedies against C. AG; no facts showed that the plaintiff personally assumed responsibility for performance or solvency.