Question juridique clé
Whether the cantonal court violated procedural law by relying on written statements instead of witness testimony.
Solution extraite
The cantonal court misapplied Geneva procedural rules by treating written third-party attestations as probative evidence, but this error did not make the judgment arbitrary in its result.
Motifs extraits
Only oral testimony before the judge has evidentiary value under Geneva civil procedure, except commissions rogatoires; written attestations are not proper witness evidence. Still, other sworn testimony supported the factual finding.