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№ 22 Wills & Estates

Can an Attorney Change a Will or Beneficiary in Manitoba?

Learn what a power of attorney does and doesn't cover in Manitoba, including wills, beneficiary changes and gifts, and the limits on an attorney's actions.

Wills & Estates5 min readTSLBy the Treadstone Law Team · ManitobaUpdated November 6, 2026
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Key takeaways
  • A will can be revoked only in the ways The Wills Act lists, and a change in circumstances alone does not revoke it.
  • An attorney under a Manitoba power of attorney must meet a legal standard of care, and a compensated attorney is held to a higher one.
  • A power of attorney ends when the donor dies, so it gives no authority over the estate after death.

You may have just learned that a parent, spouse or relative named someone as their attorney, and now you worry that person could rewrite the will, switch a beneficiary or give property away. It is a common concern, especially when the attorney is also a possible heir.

This article explains what a power of attorney is in Manitoba, what the law says about changing wills, and the limits that apply to an attorney's conduct. Some questions, such as exactly what a particular document allows, depend on its wording and are worth confirming with a lawyer.

This article covers the law of Manitoba.

What a power of attorney is

The person who gives the power is called the donor, and the person authorized to act for the donor is the attorney. An attorney does not need to be a lawyer. The word simply describes the role.

A power of attorney continues after the donor becomes mentally incompetent only if it meets set requirements. It must be in writing, signed by the donor (or acknowledged) in a witness's presence, signed by the witness in the donor's presence, and state that it continues despite the donor's mental incompetence. Mental incompetence means the inability of a person to manage their affairs.

An enduring power is void if the donor could not understand its nature and effect when signing. That matters if you doubt the donor had capacity at the time.

Can an attorney change the donor's will?

Start with how wills end. A will is revoked only by the methods in The Wills Act: a later valid will, a later writing declaring an intent to revoke made in will form, or burning, tearing or otherwise destroying it with intent to revoke. A change in circumstances alone does not revoke a will.

Some life events do affect a will by law. Marriage revokes a will unless an exception applies, such as a declaration that the will is made in contemplation of the marriage. After a divorce, annulment or the end of a common-law relationship, gifts to the former partner are revoked and the will is read as if that person died first, unless the will shows a contrary intention.

None of those rules turn on what an attorney does. Whether an attorney could ever sign or change a will for a donor is not something to assume. The answer depends on the facts and the documents, so ask a lawyer before you act on any belief either way.

Beneficiary designations and gifts

Beneficiary designations on things like insurance and registered plans, and gifts of the donor's property, are different questions from changing a will. What an attorney may do with them depends on what the power of attorney document says and on the law's standard of conduct. A lawyer can read the document and tell you what it allows.

These assets can matter a great deal after death. When a surviving spouse or common-law partner makes a Family Property Act claim, the deceased's assets include, to the extent no adequate consideration was received, jointly held property with survivorship rights to others, registered plans payable to others, and insurance or other payments made because of death. Transfers made before death can therefore affect more people than the attorney and the person receiving them.

The limits on an attorney's conduct

If an attorney's actions fall short of these standards, a lawyer can explain what options may be available to the donor or the family.

What happens when the donor dies

A power of attorney terminates when the donor dies. It also ends if the attorney dies, becomes bankrupt or becomes mentally incompetent. After death, the attorney has no authority as attorney, and the estate is dealt with by the executor named in the will or an administrator.

There is a narrow exception. An attorney who did not know of the termination, and with reasonable care could not have known, is not liable to the donor or estate for acting afterward, and acts in favour of a person who did not know of the termination remain valid.

What to do next

Early advice helps because the answer often turns on the exact documents and timing.

Frequently asked questions

Does a power of attorney let someone rewrite the donor's will?

A will is revoked only by the methods listed in The Wills Act, such as a later valid will or destruction with intent to revoke. Whether an attorney could ever act on a donor's behalf on a will depends on the facts, so get legal advice before assuming.

Does the power of attorney still work after the donor dies?

No. A power of attorney terminates when the donor dies. After that, the estate is managed by the executor or an administrator, not the attorney.

Who can be named as an attorney in Manitoba?

At the time the donor signs, the attorney must be an adult, mentally competent and not an undischarged bankrupt. The donor can name more than one person to act jointly or successively.

What standard must an attorney meet?

An uncompensated attorney must act with the judgment of a prudent, discreet and intelligent person managing their own affairs. A compensated attorney must meet the standard of a prudent professional managing other people's property.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Manitoba laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a lawyer who practises in Manitoba. Reach us at 1-844-900-1070 or send our Team a message.

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