Anderson v Anderson (2023 SCC 13)

Key takeaways {#takeaways}

• The Supreme Court of Canada enforced a separation agreement signed without lawyers, disclosure, or witnesses from a law office.
• Missing legal advice alone does not sink an agreement; courts look for actual unfairness in how it was made.
• The framework is statute-specific: courts test the agreement's process and substance against the governing provincial Act.

Anderson v Anderson at a glance {#summary}

Yes — a separation agreement can be valid without a lawyer. In Anderson v Anderson, 2023 SCC 13, the Supreme Court of Canada enforced a property agreement two spouses signed at a meeting with friends, with no legal advice and no financial disclosure. But an agreement made this way gets closer scrutiny, and the governing statute controls.

Most people assume a homemade separation agreement is worthless in court. Diana and James Anderson signed theirs at the end of a meeting arranged by two friends — no lawyers, no disclosure. Two courts reached wildly different results: the trial judge ordered Diana to pay about $90,000; the appeal court ordered James to pay about $5,000. The Supreme Court of Canada enforced the couple's own deal, ordering Diana to pay $43,382.63. Whether your kitchen-table agreement holds can swing the outcome by six figures.

The facts {#facts}

Diana and James Anderson were married for three years. It was a second marriage for both, and each brought significant assets into it: houses, vehicles, RRSPs and pensions. They had no children together. They separated on May 11, 2015.

On July 19, 2015, two friends brought the couple together to talk about reconciling. It quickly became clear that was not going to happen. At the end of the meeting, the parties signed an agreement Diana had prepared. The two friends witnessed it. There was no financial disclosure, and neither spouse got legal advice first. Diana suggested James "think it over and talk to a lawyer." He declined and signed on the spot.

The agreement was simple: each spouse kept the property in their own name and gave up claims to the other's, except for the family home and household goods, which would be divided later — by buyout or sale, after an independent valuation, with mediation if they disagreed. Diana also agreed to reconvey a truck to James, which she did.

Both spouses then acted on the deal. James took his furniture and cashed some RRSPs. Diana stayed in the home; James kept paying half the mortgage. Diana's lawyer later asked James to formalize the agreement, but he never responded — and never repudiated it either.

Diana petitioned for divorce on December 10, 2015, claiming no property division. Nearly 17 months later, on May 5, 2017 — almost two years after signing — James counter-petitioned for property division, arguing the agreement was signed without legal advice and under duress.

The legal issues {#issues}

Saskatchewan's Family Property Act recognizes two kinds of spousal property agreements. An "interspousal contract" under s. 38 — signed with formal acknowledgments before independent lawyers — is presumptively enforceable. An informal agreement that misses those formalities falls under s. 40: the court "may give that agreement whatever weight it considers reasonable."

The Andersons' agreement was a s. 40 agreement. So the issues were:

1. How should a court weigh a property agreement that is not presumptively binding under the statute?
2. Does the framework from Miglin v Miglin, 2003 SCC 24 — developed for spousal support agreements under the federal Divorce Act — apply to provincial property legislation?
3. Was this particular agreement binding and fair, given the absence of legal advice and disclosure?

The three courts had split badly. The trial judge held the agreement was not binding — calling the lack of legal advice "most troubling" — equalized the property under the Act, and ordered Diana to pay about $90,000. The Saskatchewan Court of Appeal applied the Miglin framework, held the agreement deserved great weight, valued the property as of December 2015, and ordered James to pay Diana about $5,000.

What the court decided {#decision}

A unanimous seven-judge Supreme Court of Canada, in reasons by Justice Karakatsanis, allowed the appeal and enforced the agreement on its own terms. Dividing only what the agreement contemplated dividing — the family home and household goods, valued at the June 2018 trial date — Diana owed James $43,382.63 (paras 84–85).

Three holdings matter:

1. Miglin is not a one-size-fits-all test. The Miglin framework grew out of spousal support under the federal Divorce Act. It "is not, and was never intended to be, a framework of general applicability" for all domestic contracts (para 7). The analysis is statute-specific: property division is largely backward-looking, support is forward-looking, and provinces control property law. Courts must tailor the analysis to the Act in front of them (paras 30–31).

2. Deference to spouses' own deals. Domestic contracts "should generally be encouraged and supported by courts, within the bounds permitted by the legislature, absent a compelling reason to discount the agreement" (para 33). Courts must watch for vulnerability without presuming spouses lack the ability to contract just because separation is emotional (para 34). Vulnerability must be grounded in evidence, not assumed (para 69).

3. No legal advice, no disclosure — not fatal by itself. These safeguards matter, but under s. 40 they are not statutory requirements, and "their absence, without more, does not necessarily impugn the fairness of an agreement" (para 8). The court also warned the reverse: legal advice does not automatically immunize a contract from unfairness (para 35). Here, James could point to no prejudice — no hidden assets, no power imbalance, no misunderstanding — so the agreement deserved serious consideration (para 10).

On the facts, both lower courts got the remedy wrong. The Court of Appeal's December 2015 valuation handed Diana a windfall on James's business interest (which fell in value by $160,000 between December 2015 and May 2017) and stripped James of home equity he kept paying for. The trial judge's approach ignored the agreement entirely and made Diana share business losses she had always refused to invest in (paras 75–78). Enforcing the couple's own simple deal was the fair and equitable result (para 83).

Where the law stands now. Anderson was decided under Saskatchewan's Family Property Act and remains current law. If you separate in BC, the governing scheme is Part 5 of the Family Law Act, SBC 2011, c 25: s. 81 presumes equal division "subject to an agreement," and s. 93 sets out the only grounds for setting aside a signed, witnessed property agreement — including failure to disclose significant property or debts, taking improper advantage of vulnerability, or a spouse not understanding the agreement. BC's statute, unlike Saskatchewan's s. 38, does not require lawyers for an agreement to be binding, but non-disclosure is an express ground for setting an agreement aside in BC. Anderson's general principles — deference to spouses' own bargains, statute-specific analysis, no presumption of vulnerability — guide how BC courts apply that test.

Is a separation agreement valid without a lawyer? {#the-test}

Yes, it can be. Anderson confirms that no Canadian court should throw out a separation agreement just because the spouses signed it without lawyers. The trial judge did exactly that — treating the missing legal advice as "most troubling" and refusing the agreement any weight — and the Supreme Court of Canada held that was an error (paras 18, 57, 62).

But "can be valid" is not "will be valid." The court asks three questions, and an agreement made without professional safeguards invites closer inspection at each step:

• Was it a real contract? There must be a meeting of the minds — in the court's Latin, consensus ad idem — on the essential terms. Leaving one issue (like the home) to be resolved later by a defined method does not make the deal an unenforceable "agreement to agree" (paras 58–60).
• Was the process fair? The challenger must point to evidence of undue pressure, oppression, exploitation of a power imbalance or vulnerability, or a defect that stopped a party from understanding the bargain (para 49).
• Is the substance fair? The deal is measured against the objectives and factors of the governing statute — not against strict statutory entitlements, but against a "range of fair and equitable possibilities" the Act contemplates (para 51).

In BC, the second and third questions run through FLA s. 93, and missing financial disclosure carries more statutory weight here than it did in Saskatchewan. A DIY agreement that survives in one province could fail in another. That is the core lesson: the statute, not a universal test, decides.

The framework {#numbers}

The Anderson approach to an informal property agreement (adapted from paras 48–52; BC comparators from FLA Part 5):

Stage	Question the court asks	What can defeat the agreement	BC (FLA) comparator
1. Validity	Is it a valid contract on ordinary principles — offer, acceptance, agreement on essential terms?	No meeting of the minds; a true "agreement to agree" with no method of resolution	Same contract-law starting point; s. 93(3)(d) picks up common law grounds making a contract voidable
2. Procedural integrity	Did the parties sign freely, understanding the meaning and consequences?	Evidence of undue pressure, oppression, exploited power imbalance or vulnerability, or a defect blocking understanding	s. 93(3)(a)–(c): non-disclosure of significant property or debts; improper advantage of vulnerability; failure to understand
3. Substantive fairness	Does the deal fall within the range of fair outcomes the statute contemplates?	Substance that departs from the Act's objectives, weighed against factors like length of marriage, contributions and debts	s. 93(5): even a procedurally clean agreement can be set aside if "significantly unfair," considering time passed, intention of certainty, and reliance

Missing legal advice or disclosure is relevant at stage 2 — but in Anderson, absent any resulting prejudice, it defeated nothing.

What this means if you're separating in Surrey {#bc-impact}

If you and your spouse wrote your own separation agreement, do not assume it is worthless — and do not assume it is bulletproof. Both mistakes cost the Andersons years of litigation over a three-year marriage.

For BC couples, the practical points are these:

• Your own deal matters. BC's Family Law Act starts from equal division of family property and debt, but s. 81 makes that presumption "subject to an agreement." Courts here, guided by Anderson, will take a genuine bargain seriously. See our overview of separation agreements in BC.
• Disclosure is the pressure point in BC. Under FLA s. 93(3)(a), failing to disclose significant property or debts is an express ground for setting an agreement aside. The informal exchange that survived in Anderson is riskier under BC's statute. Trading full financial information protects the deal you make.
• Acting on the agreement counts. The Andersons performed their deal for nearly two years before James challenged it. Reliance and the passage of time are factors BC courts weigh under s. 93(5). Waiting to challenge — or challenging only when asset values move — is an uphill argument.
• Independent legal advice is protection, not a formality. Anderson says its absence is not automatically fatal; it does not say advice is unnecessary. A reviewed agreement is far harder to attack, and review is a fraction of the cost of the three-court journey the Andersons took. If you are working things out together, family mediation paired with independent advice is often the practical path.

Property agreements are one piece of a separation. Support obligations run on different rules — see divorce in BC and child support in BC — and Anderson itself stresses that support and property call for different analyses.

How a lawyer uses Anderson {#in-practice}

Defending a DIY agreement. Anderson is the lead authority that an informal agreement deserves serious consideration. Counsel will emphasize evidence that both spouses understood the deal, that neither exploited the other, that the parties performed it, and that its substance sits within the range of outcomes the FLA contemplates. The challenger carries the burden of pointing to real evidence of an unfair process — not just the absence of lawyers (paras 49, 69).

Attacking one. The path Anderson leaves open is evidence-based: hidden assets or debts, a spouse who did not grasp what they were giving up, pressure or exploited vulnerability, or terms significantly unfair against the statute. In BC, s. 93(3)(a) makes non-disclosure a freestanding ground — often the first place counsel looks.

Drafting. Anderson rewards clean, complete process: written terms, witnessed signatures, exchanged disclosure, independent advice for each spouse, and a defined mechanism for anything deferred. The Andersons' agreement survived without most of that — but only after a trip to the Supreme Court of Canada. Careful drafting is how you avoid being the test case. Examples of how agreements play out are in our case studies.

Frequently asked questions {#faq}

Is a separation agreement we wrote ourselves legally binding in BC?

It can be. A written agreement about property and debt, signed and witnessed, is effective under BC's Family Law Act unless a court sets it aside on the grounds in s. 93 — such as non-disclosure, exploited vulnerability, or failure to understand it. Anderson confirms courts should respect genuine bargains rather than presume they are invalid. Whether a specific agreement holds depends on its facts.

Do we both need our own lawyer for the agreement to count?

No statute in BC makes independent legal advice a precondition for a binding property agreement, and Anderson holds that missing advice, on its own, does not make an agreement unfair. But separate advice for each spouse makes the agreement much harder to challenge later, and helps make sure each of you understands the rights being given up.

Can my spouse challenge our agreement years later?

They can apply, but delay works against them. In Anderson, the husband challenged the agreement nearly two years after signing and performing it, and the court found it would be unfair to let him benefit from that delay. In BC, s. 93(5) directs the court to consider time passed, the intention to achieve certainty, and reliance on the agreement.

References {#references}

Case

• Anderson v Anderson, 2023 SCC 13, [2023] 1 SCR 473 (Karakatsanis J for a unanimous seven-judge court; judgment May 12, 2023). Full text read at https://decisions.scc-csc.ca/scc-csc/scc-csc/en/item/19906/index.do — accessed 6 Aug 2026. All paragraph pinpoints, dates and dollar figures in this commentary are taken from this source.
• CanLII mirror at https://www.canlii.org/en/ca/scc/doc/2023/2023scc13/2023scc13.html — FAILED to load (HTTP 403), 6 Aug 2026; not relied on.
• SCC "Case in Brief" at https://www.scc-csc.ca/case-dossier/cb/2023/40059-eng.aspx — FAILED to load (HTTP 404), 6 Aug 2026; not relied on.

Cases discussed within the judgment (read only as described in Anderson; not independently fetched)

• Miglin v Miglin, 2003 SCC 24, [2003] 1 SCR 303
• Hartshorne v Hartshorne, 2004 SCC 22, [2004] 1 SCR 550
• Rick v Brandsema, 2009 SCC 10, [2009] 1 SCR 295
• Anderson v Anderson, 2021 SKCA 117 (court below); Anderson v Anderson, 2019 SKQB 35 (trial)

Statutes

• Family Law Act, SBC 2011, c 25, Part 5, ss. 81, 93, 94 — https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/11025_05 (s. 81: #section81; s. 93: #section93) — accessed 6 Aug 2026 (text read directly on bclaws).
• Family Property Act, SS 1997, c F-6.3, ss. 21, 22, 23, 24, 38, 40 — read as reproduced in the appendix to Anderson v Anderson, 2023 SCC 13, at the SCC decisions URL above — accessed 6 Aug 2026. (Saskatchewan statute; no bclaws source exists.)
• Divorce Act, RSC 1985, c 3 (2nd Supp), s. 15.2 (context for Miglin, as described in the judgment) — https://laws-lois.justice.gc.ca/eng/acts/d-3.4/ — not independently fetched; cited as described in the judgment.