Questione giuridica chiave
Whether the 9 December 1997 letter constituted a guarantee/patronage undertaking under Art. 111 CO
Decisione estratta
The letter was only an informational statement about the branch's registration and management; it did not contain any promise or assumption of an obligation by B SA.
Motivazione estratta
Applying the reliance theory, the text was clear and, in context, merely confirmed the branch's existence and activities. No serious reason existed to depart from the wording, and the internal documents not shown to B SA did not alter that interpretation.