Key legal question
Whether the fiduciary was contractually obliged to verify the validity of the guarantee received from C.________
Extracted holding
Yes. Although the written mandate did not expressly mention verification, the surrounding circumstances and the relationship of trust made such verification part of the mandate.
Extracted reasoning
The court held that interpretation under the principle of trust must consider text, context, purpose, and recognizable pre-contractual circumstances. The fiduciary’s active role in the negotiations and the confidence it inspired meant the investor could in good faith expect verification of the guarantee.