Alternate Guardians: The Conversation Most Canadian Parents Skip

A 38-year-old single mother in Vancouver names her sister as the guardian for her two young children in a will she signs in 2019. She does not name an alternate. Five years later, in a separate car accident, she and her sister are killed within hours of each other. Her parents apply to be granted guardianship; her ex-husband's parents file a competing application; her late sister's spouse files a third. The two children spend the next 11 months in temporary custody with provincial child-protection involvement while a BC court works through a contested best-interests hearing.

A single named guardian, no alternate, two simultaneous unexpected deaths — and the carefully chosen sister appointment becomes worthless overnight.

This scenario is rare in its specifics but the underlying lesson is not: testamentary guardian appointments without backups are a single point of failure, and the cost of that failure is paid by your children at the worst possible moment in their lives.

What an alternate guardian actually is #

The alternate guardian (sometimes called the backup or substitute guardian) is the second-choice person your will appoints to take care of your minor children if the first-choice guardian cannot or will not act. The drafting language nests the appointments in the same way it does for executors: "I appoint my sister, Jane Doe, as the guardian of any of my children who are minors at the date of my death. If my sister is unable or unwilling to act, or having accepted the appointment is unable or unwilling to continue, I appoint my close friend, Maria Smith, as the alternate guardian."^[1]

The alternate's authority is dormant until activated by one of the same triggers that activates an alternate executor:

1. The primary guardian dies before the parent.
2. The primary guardian declines the role.
3. The primary guardian becomes unable to continue after starting.

In each scenario, the alternate steps in. Whether the court formally needs to confirm the appointment depends on the province and the circumstances — see the next section.

How Canadian family courts handle testamentary guardian appointments #

Across the common-law provinces, the relationship between a parent's testamentary appointment and the family court's authority is consistent in pattern but varies in detail.^[1][2][3]

Ontario uses the Children's Law Reform Act. A parent with decision-making responsibility (the term that replaced "custody" in Ontario) can appoint a person by will to have decision-making responsibility after the parent's death. The appointment is temporary — it expires 90 days after it takes effect unless the appointee applies within that window for a more permanent parenting order. The court applies the best-interests test, with the parent's written choice as one factor.^[1]

British Columbia uses the Family Law Act. A child's guardian can appoint, in a will or a prescribed form, a person to become the child's guardian on the appointing guardian's death. The appointment generally takes effect on death without a court application once the appointee accepts it, though the appointee receives only the parental responsibilities the appointing guardian had, and disputed cases still end up in court for resolution.^[2]

Alberta uses the Family Law Act (SA 2003, c F-4.5). A guardian can appoint another person to become a guardian on the appointing guardian's death, with the appointment taking effect under specific conditions and subject to the court's overriding best-interests jurisdiction.^[3]

Across all common-law provinces the pattern holds: the written appointment is given significant weight, but the child's best interests are the ultimate touchstone, and contested cases require a court hearing.

The role of the alternate appointment in this framework is critical. Where the primary guardian cannot act, the will's nested appointment of an alternate guides the court immediately to the testator's second choice. Without an alternate, the court is left to evaluate competing applications from anyone with sufficient interest — extended family on either side, godparents, family friends, in some cases provincial child-protection services if no acceptable applicant emerges quickly.

What happens when there is no alternate #

Three failure modes occur in practice when parents name only a primary guardian:

The primary predeceases. The most common scenario over a long horizon. A child is born when both parents are 32; the will is signed naming the parents' 35-year-old sister as guardian; thirty years later the parents update nothing and the sister has predeceased them. The will appoints a dead person.

The primary declines. Family circumstances change over the 20-plus years a guardian appointment is in force. A divorce, a serious illness, a move overseas, a change in the prospective guardian's own family situation — any of these can render the original appointee unable to accept the role at the moment of need. Without an alternate, the family is back to a contested court process.

Joint catastrophic loss. Rare but devastating. Parents and primary guardian killed in the same incident — a car accident, a small-plane crash, a house fire affecting two adjacent properties. The Vancouver scenario at the top of this article is a composite, but it reflects the kind of fact pattern estate-planning lawyers across Canada warn about.

In each scenario, the absence of an alternate forces the courts and the extended family into a decision your will was meant to make. The court applies the best-interests test, but with no parental preference to anchor it, the process becomes essentially adversarial between whoever applies.

How many alternates to name #

For parents of minor children, the minimum responsible drafting standard is one primary plus one alternate. Many estate-planning lawyers recommend a second alternate as well, particularly when:

• The children are young (longer horizon over which named adults can become unavailable).
• The primary and first alternate are from the same family branch or geographic area (correlated risk of unavailability — illness, accident, regional event).
• The parents have very specific values or religious commitments that significantly narrow the pool of acceptable guardians.
• The primary guardian is themselves a parent of young children who may, in a decade, have their own family logistics that change the calculus.

Three appointments — primary, first alternate, second alternate — is not unusual, and the drafting cost is the same as one. Five or more appointments starts to feel performative and may signal that no single choice was made with conviction.

The conversation most parents skip #

Most parents have the conversation with their primary guardian once and never with the alternate. That asymmetry causes problems.

The alternate also needs to be asked. They need to understand they are the backup. They need a chance to say no while the parents are still alive to rewrite the appointment. They need to know roughly what the parents' values, finances, and expectations are. Without that conversation, the alternate at the moment of need is being asked to take in someone else's children with no preparation, and the answer they give is often a reluctant yes that ages badly.

Two practical scripts that work for the conversation:

For the primary: "We're updating our wills and we'd like to name you as guardian for the kids if anything happens to both of us. We don't expect anything to happen. We want you to know this is in the will and to be comfortable with it, and we want to talk about what you'd want to know if the day ever came."

For the alternate: "We're updating our wills and we've named [primary] as the kids' guardian, but we're also naming you as the alternate in case [primary] can't do it. The chance of it falling to you is small, but we wanted you to know and to be comfortable with it."

The conversations are uncomfortable. They are also the difference between a written appointment that actually works at the moment of need and one that collapses on first contact with reality.

Where to record the choice #

The guardian appointment goes in the parent's will, under the executor and beneficiary clauses. A separate signed letter to the guardian is not legally binding for the appointment itself but is useful for documenting:

• Specific values and parenting preferences you want carried forward
• Practical information about the children's schools, doctors, friends, routines
• Your views on religious upbringing, education, extracurricular activities
• Financial expectations (what the trustee will fund, what the guardian is expected to handle from their own resources)

In most parents' situation, the will handles the legal appointment and the letter handles the operational context. Both should be updated together when circumstances change.

What we focus on at It's Simple Will #

The It's Simple Will questionnaire walks parents through naming a primary guardian and at least one alternate by default. We also surface the separation between the guardian role and the trustee role for children's funds, because conflating the two is one of the most common drafting mistakes we see in DIY wills.

The framing that lands with most parents: name the alternate, and have the conversation with them. A guardian appointment without a backup is a plan that depends on nothing going wrong with one specific person over twenty years — which is not, in any real sense, a plan.

Related reading: how to choose a guardian for your children in a Canadian will, naming alternate executors, and our pillar on how to write a will in Canada.