Addendum To Agreement Template for Switzerland

An Addendum To Agreement is a formal legal document that allows you to modify specific terms of an existing contract without the need to draft an entirely new agreement. Under Swiss law, this document must comply with the Swiss Code of Obligations and maintain the same formal requirements as your original contract, ensuring that any modifications are legally binding and enforceable.

When do you need this document?

You'll need an Addendum To Agreement when circumstances change after signing your original contract. Common situations include when your business relationship evolves and you need to adjust payment terms, extend deadlines, or modify the scope of services. This document is particularly valuable for commercial partnerships, employment agreements, and service contracts where flexibility is essential. Rather than terminating your existing agreement and starting over, an addendum allows you to preserve the foundation of your contractual relationship while making necessary adjustments. It's also required when adding new parties to an existing agreement or when regulatory changes necessitate updates to your contract terms.

Key legal considerations

Your addendum must clearly identify all parties involved and reference the original agreement with its exact date and title. Every modification should be numbered and specifically reference the original contract sections being changed. You must explicitly state whether terms are being modified, added, or deleted, and include a clause confirming that all other provisions of the original agreement remain in full force. The addendum should maintain consistency with the original contract's language and structure, and all parties must sign the document for it to be legally effective. Consider including definitions for any new terms introduced and ensure that the modifications don't create conflicts with unchanged portions of your original agreement.

Legal requirements in Switzerland

Under the Swiss Code of Obligations, your addendum must comply with Article 16 OR regarding form requirements, meaning it must match the formality level of your original agreement. If your original contract required written form or notarization, your addendum must meet the same standards. Article 18 OR governs the interpretation of contract modifications, emphasizing that the true intention of all parties must be clearly expressed. The principle of good faith under Article 2 of the Swiss Civil Code applies to all contract modifications, requiring honest dealing throughout the amendment process. If your agreement involves public entities or requires government filing, you may need to consider language requirements under the Federal Act on Languages. Documentation should be in German, French, or Italian depending on your canton, and you should maintain copies of both the original agreement and all addenda for your records.