Can a codicil amend an Israeli will, or do I need to write a new one?

Israeli succession law treats any document that alters a testamentary disposition as itself a will, which means a codicil must be executed in one of the four recognized forms. Those forms are a handwritten will under Section 19, a will witnessed by two witnesses under Section 20, a will made before an authority such as a notary or judge under Section 22, and an oral will made by a dying person under Section 23. A codicil written in a different and weaker form than the original will is the most common reason an amendment fails. Section 36(b) governs the relationship between documents: a later valid codicil revokes the earlier will only where the two genuinely conflict, and every clause not contradicted continues to operate. This lets a testator make a narrow change, such as replacing one executor or adjusting a single bequest, while leaving the rest of the estate plan intact.

For a diaspora family, the practical question is usually how to change an Israeli will that covers Israeli assets while a separate foreign will covers assets at home. The safest route is to execute the codicil in Israel-compliant form, ideally witnessed by two independent adults or signed before a notary, and to keep it physically with the original will. A frequent and costly mistake is editing the will by hand, crossing out lines, or initialing changes, because those marks can invalidate the affected clause and invite a challenge from disappointed heirs. If the changes are extensive, a fresh valid Israeli will with an express clause revoking all earlier wills is cleaner than stacking several codicils that later have to be read together.

From the full guide: Israeli Will Requirements: How to Write a Valid Will in Israel

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