Swiss Will Missing Date or Signature? Validity & Art. 505 SCC

Under Article 505(1) of the Swiss Civil Code (SCC), a holographic (handwritten) will must be written entirely by hand from start to finish, specify the day, month, and year of execution, include the place of creation, and bear the testator's personal handwritten signature. If a will lacks a date or location, it is not automatically void per se, but it suffers from a formal defect that may expose the document to an action for annulment (Art. 519 SCC) by statutory heirs.

To prevent unfair invalidation of genuine testamentary intentions, Swiss inheritance law contains a statutory saving clause in Article 520a SCC: an incomplete, missing, or erroneous date or place only invalidates the will if the execution date cannot be established by other extrinsic evidence and determining that timing is indispensable to verify the testator's capacity of discernment or to resolve a conflict between competing wills.

Key Takeaways at a Glance:

Statutory Requirements (Art. 505 SCC): Day, month, year, location, and signature must all be handwritten.
Saving Clause (Art. 520a SCC): A missing date is curable unless timing is essential to resolve mental capacity or conflicting wills.
Missing Signature: Incurable defect; an unsigned will is entirely null and void.
Reviewed and verified under the Swiss Civil Code (2023 Reform) by the onlinedokument.ch Legal Team.

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1. Why Dating and Signatures Matter in Swiss Succession

The formal requirements under Swiss law serve critical protective functions:

Establishing Priority (Art. 511 SCC): If a deceased left multiple wills, the newer document revokes older dispositions. Without an exact date, establishing the chronological hierarchy becomes contentious.
Confirming Testamentary Capacity: If cognitive decline occurred in later years, the date proves the will was drafted during a period of full mental competence.
The Critical Role of Signatures: While dating defects can sometimes be cured under Art. 520a SCC, a missing handwritten signature cannot be cured under any circumstances.

Formal Requirement	Legal Consequence if Missing	Curability under Art. 520a SCC
Date (Day/Month/Year)	Contestable in court	Curable if timeframe is provable
Place of Execution	Minor formal defect	Rarely leads to invalidation on its own
Handwritten Signature	Total invalidity	Incurable; will is declared void

Expert Tip: Review our detailed guide on how to contest a will in Switzerland and find out where to store your Swiss will to ensure safe retrieval.

2. Comprehensive Advance Planning in Switzerland

In addition to drafting a dated will, complete your estate planning with a Swiss Advance Healthcare Directive for medical preferences and a General Power of Attorney for ongoing financial representation. Outstanding private debts should be formalized through an Acknowledgment of Debt.

3. Step-by-Step Instructions

Step 1: Write Full Date by Hand: Always write out the day, month, and full year (e.g., "Zurich, 24 October 2024").
Step 2: Sign Immediately Below: Place your signature at the very end of the text.
Step 3: Date All Codicils Separately: Any subsequent amendments or codicils require their own distinct date and signature.

Frequently Asked Questions

Is a will valid if only the month and year are written?

Yes, under Art. 520a SCC it remains valid unless an exact day is needed to resolve a dispute with another will or prove testamentary capacity.

Can I type the date on a computer?

No. Under Article 505 SCC, the entire will, including the date, location, and signature, must be handwritten by the testator.

What if I accidentally write the wrong year?

Obvious clerical errors (writing 2024 instead of 2023) can be interpreted and corrected by Swiss probate courts if the true intent is clear from extrinsic facts.