Art. 239 CPC from 2023

Art. 239 Notice to the parties and statement of grounds
1
2 A written statement of the grounds must be provided if one of the parties so requests within 10 days of the notice being given of the decision. If no statement of grounds is requested, the parties are deemed to have waived their right to challenge the decision by appeal or objection.
3 The above is subject to the provisions of the Federal Supreme Court Act of 17 June 2005 (1) on notice of decisions that may be referred to the Federal Supreme Court.
(1) SR 173.110Es besteht kein Anspruch auf Aktualität und Vollständigkeit/Richtigkeit.