Yes, at any time while you have capacity — either by a codicil or, more commonly now, by making a fresh will that revokes the old one.
The Canadian position
A codicil must be signed and witnessed with the same formality as a will. Because a codicil separated from its parent document causes problems, most lawyers now simply redraft.
Marriage or divorce can revoke a will or gifts within it, depending on the province and the date.
The Islamic position
A wasiyyah is revocable during life. There is no religious obstacle to changing it as circumstances change.
Where the four schools differ
This question turns on one issue in our madhhab register: Making a wasiyyah — form, capacity and revocation — what does a wasiyyah have to look like, and what must the person making it be, for it to be validly made — and how is it undone?
Researched positions from our madhhab register — issue wasiyyah-formation, reviewed 2026-09-01.
Three things the four schools do not divide on, and they are the three a Canadian family usually needs. First, revocation. The Kuwaiti Mawsu’a records it as agreed — “the jurists agreed that a wasiyyah is a non-binding contract, and that the testator may in his lifetime revoke it in whole or in part”, whether he made it in health or in his last illness — and Ibn Qudama reports the same as ijma‘, naming Malik, al-Shafi‘i and Ahmad. Revocation needs no formality: saying so does it, and so does any act inconsistent with the bequest — selling the thing, giving it away, giving it in charity, making it a dower or a waqf. (Merely using the thing does not. And al-Mughni reports a contrary view from the ‘people of opinion’ that a sale is not a revocation because a substitute came in for it, a view later Hanafi manuals do not follow; the Mawsu’a records the sale rule as agreed.) Second, capacity: sound mind is a condition by express agreement, so the bequest of a madman, of one whose reason has gone and of an unconscious person is void in every school. Third, coercion. The classical category is ikrah, and a wasiyyah made under it is not merely voidable but void — the Mawsu’a puts the coerced, the joking and the mistaken together, “because these accidents destroy consent”, with Hanafi, Maliki and Shafi’i authority; the Hanbali rule that verbal dispositions fall void under coercion is stated in the same encyclopaedia’s entry on ikrah rather than in its section on wills. One recorded Maliki qualification runs the other way on revocation: where the testator declared in the will itself that there was to be no revoking it, the Malikis are reported not to let a revocation undo it.
Full positions, evidence and history: Making a wasiyyah — form, capacity and revocation — the issue page.
What to do about it
- Review the will after any marriage, divorce, birth or death in the family.
- Review it after buying property or starting a business.
- Destroy old originals once a new will is signed.
This is legal information only. For advice on your own circumstances, speak to a lawyer.
Citations & sources
Every factual claim on this page traces to a source below. Details change — check the original source before relying on any figure, fee or legal position. Anything under “further reading” is related material, not a source for what is stated here.
- Succession Law Reform Act, RSO 1990, c S.26 — Government of Ontario
- Administering estates — Government of Ontario
- How to revoke change will codicil ontario — Treadstone Law
- Marriage revokes will ontario — Treadstone Law
- Does marriage revoke a will ontario — Treadstone Law
- Does divorce revoke a will in ontario — Treadstone Law
- Wills & estates practice — Treadstone Law