Question juridique clé
Whether a lease termination served on an outdated official form is null
Solution extraite
No; the old form remained valid because it still gave the tenant the information needed to challenge the notice or seek extension, so nullity would be excessive formalism.
Motifs extraits
Art. 266l CO and Art. 9 OBLF require information enabling the tenant to act; since the tenant received sufficient notice of the competent authority and deadline, the purpose of the rule was met despite the obsolete form.