Questão jurídica principal
Whether the cantonal court violated the right to be heard by treating the respondents as entitled to sue and by relying on the 26 September 1999 and 22 February 2000 letters.
Decisão extraída
The complaint failed: the disputed documents were authentic enough, and the challenge to standing concerned federal substantive law and was not reviewable in this public-law appeal.
Fundamentação extraída
Standing is a matter of federal private law; the factual findings were not arbitrary, since the 26 September 1999 letter came from B. SA and the 22 February 2000 letter expressly showed that A. SA had taken over the lease of the arcade.