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Art. 12 Bundesgesetz vom 30. März 1911 betreffend die Ergänzung des Schweizerischen Zivilgesetzbuches (OR)

OR; Erste Abteilung: Allgemeine Bestimmungen; Erster Titel: Die Entstehung der Obligationen; Erster Abschnitt: Die Entstehung durch Vertrag; B. Form der Verträge; II. Schriftlichkeit; 1. Gesetzlich vorgeschriebene Form; a. Bedeutung
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Art. 12 OR

Ist für einen Vertrag die schriftliche Form gesetzlich vorgeschrieben, so gilt diese Vorschrift auch für jede Abänderung, mit Ausnahme von ergänzenden Nebenbestimmungen, die mit der Urkunde nicht im Widerspruche stehen.

← Art. 11 OR Bundesgesetz vom 30. März 1911 betreffend die Ergänzung des Schweizerischen Zivilgesetzbuches (OR) Art. 1 OR →

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Gerichtsentscheide zu dieser Bestimmung (22)

A/324/2025 · ge (art. 12 ss de la loi fédérale complétant le Code civil suisse du 30 mars 1911 (Livre cinquième : Droit des obligations - CO - RS 220))
Appeal Inadmissibility Due to Lack of Handwritten Signature
These articles were cited in relation to the requirement of a handwritten signature for the written form of the appeal.
HOR.2024.7 · ag (Art. 12 OR)
Breach of Property Purchase Agreement
Cited for the principle that amendments to contracts must adhere to the same form requirements as the original contract, unless otherwise specified.
HOR.2021.13 · ag (Art. 12 OR)
Conditional Real Estate Agreements Voided Due to Incomplete Building Application
This provision states that amendments to contracts requiring a specific form also need to adhere to that form.
ZK 2021 211 · be (Art. 12 OR)
Tenant Eviction Upheld After Appeal Challenging Summary Procedure Fairness
Cited in the reasoning regarding the annulment of the bank transfer command (irrelevant to the final order, but used in context).
C/21230/2016 · ge (Art. 12 CO)
Employee Wage Dispute and Abusive Dismissal Following Corporate Acquisition
Cited in the reasoning concerning the non-applicability of form requirements for the cancellation or modification of a reserved form.
100 2018 9 · be (Art. 12 OR)
Recipient v. Municipality Regarding Cessation of Social Assistance Benefits
Cited regarding the validity of oral lease agreements, even though not directly in the operative part, it is referenced in section 5.3.2 concerning the non-requirement of a written sublease contract.
2016.03.11.stger.2 · bl (Art. 12 OR)
Taxpayer Not Entitled to Annuity Deduction for Property Purchase Payments
States that any amendment to a contract requiring written form also requires written form.
A/3106/2015 · ge (art. 12 de la loi fédérale du 30 mars 1911, complétant le Code civil suisse (CO - RS 220))
Social Insurance Fund Contribution Opposition Withdrawal Dispute
Cited in the reasoning to support the principle that withdrawal must follow the same form as the original act, which relates to the merits of the appeal.
ML.2014.253 · vd (Art. 12 CO)
Enforcement of Judicial Settlement Agreement vs. Modification of Installment Payments
Cited in the preamble to list potentially relevant provisions, used in the reasoning to assess the validity of contract modifications (which was the core issue leading to the final rejection).
38.2012.67 · ti (Art. 12 CO)
Unemployment Benefit Suspension Overturned: Fixed-Term Contracts Reclassified as Indefinite Employment
Cited in the reasoning regarding the required method of contract modification.
11 10 179 · lu (Art. 12 OR)
Oral Modification of Written Wage Criteria in Employment Contract
This provision was discussed regarding the principle that stipulated form requirements do not apply against mandatory law or subsequent agreements regarding contract content.
VB.2010.00439 · zh (Art. 12 OR)
Development Plan Amendment Procedural Dispute
Cited as the general legal principle governing the uniform form for modifying or supplementing a development plan, which informed the dismissal of the appeal.
JK 09 20 · lu (Art. 12 OR)
Appeal Regarding Deletion of Residential Right and Registration of Tenancy Agreement
Cited in the context of determining whether the agreement to extinguish the right of residence and conclude the lease agreement required public notarization, ultimately concluding it did not.
B-3381/2008 (Art. 12 CO)
Tacit Renewal of Fixed-Term Employment Contracts Unlawful
Cited to support the requirement that written contracts must also be extended in writing, especially for significant modifications like contract duration.
BZ.2006.54 · sg (Art. 12 OR)
Real Estate Advance Payment Refund Dispute Following Contract Termination
The court considered this article in defining the distinction between a contract modification (which requires form) and contract dissolution (which is form-free under Art. 115 OR analogously).