Question juridique clé
Whether ASLOCA's denunciation had to be treated as anonymous under Art. 10A LPA/GE
Solution extraite
The complaint was not anonymous because the author signing the denunciation was identified; the authorities were therefore entitled to act on it.
Motifs extraits
The cantonal court's approach was not arbitrary: Art. 10A LPA/GE bars only anonymous denunciations, and the Department could rely on a letter signed by a known lawyer even if the underlying informants remained unnamed.