Executive Summary
Most people picture abduction as a departure — a parent, a child, an airport, no consent. But the Convention has a second, quieter trigger: wrongful retention, which begins with permission and ends when an agreed period lapses and the child is still abroad. In Office of the Children's Lawyer v. Balev (2018), the Supreme Court of Canada — settling a national split — adopted the "hybrid approach" to habitual residence: a court weighs all relevant circumstances, not just the parents' intentions, as of the retention date. The case is also a lesson that a Hague return decides only the forum: the children were ordered back, the home court then decided custody, and the family's situation ultimately reversed. This article is educational and not legal advice; retention cases, driven by remote work and post-pandemic mobility, are a growing part of the field.
Introduction
Most people picture abduction as a departure. But the Convention has a second, quieter trigger — wrongful retention — and it begins with the opposite: permission. A signed letter. An agreed visit, an agreed school year abroad. And then a date that comes and goes with the child still there.
Retention cases are the field's hardest precisely because they start lawfully. Every fact in the first act is consensual; the wrong crystallizes in a single moment — the day the agreed period ends — and by then the child has months of new school, new friends, new life in the destination. The question that decides such cases is the Convention's oldest one: where was the child habitually resident on that day? The case that answers it for Canada — and helped the whole common-law world converge on one answer — is Office of the Children's Lawyer v. Balev, decided by the Supreme Court of Canada on 20 April 2018.
Legal Background: return, not custody — and wrongful retention
A Hague return case decides only whether a wrongfully removed or retained child should be returned to their country of habitual residence, where custody is then decided. Wrongful retention is the mirror of wrongful removal: the child travels lawfully, with consent, but is kept beyond the agreed period without the other parent's agreement. The pivotal question is the child's habitual residence on the date the retention became wrongful — a question that, as Balev shows, can turn on how much weight a court gives to the parents' original agreement versus the child's growing links in the new country.
What happened
The parents married in Canada in 2000 and built their life in Germany, where their two children were born and raised. The marriage ended; all four stayed in Germany. By 2013 the children were struggling in German schools, and the parents made the kind of sensible, loving arrangement international families make every year: the children would spend the 2013–14 school year in Ontario with their mother. The father signed a letter of consent running to 15 August 2014, and a notarized document temporarily transferring custody for the school year. Nothing about the arrangement was ambiguous, and nothing about it was hostile.
In the spring of 2014, before the agreed period expired, it became clear the mother did not intend to bring the children back. The father revoked his consent and invoked the Hague Convention: the children, he argued, remained habitually resident in Germany — the agreed stay was a visit with an end date, not a migration — and keeping them past it was wrongful retention.
What followed is a four-year procedural odyssey that outlived its own subject. Ontario's courts ordered the children returned; they went to Germany in 2016. There, the German courts — now properly seized as the courts of the children's home — took up the actual custody question, and the family's situation ultimately reversed, with the children returning to live in Canada under a German ruling rather than a Hague order. By the time Canada's Supreme Court heard the Hague appeal, there was nothing left to order: the case was moot. The Court decided it anyway, because lower courts across Canada were splitting on the central question, and the next family deserved an answer.
What the Court decided
By six votes to three, in a judgment written by Chief Justice Beverley McLachlin, the Court replaced Canada's parental-intention doctrine with the hybrid approach: habitual residence is determined by all relevant circumstances — the parents' shared intentions, yes, but also the child's actual links and integration: school, friends, language, duration, the texture of the child's real life. No single factor rules. The judge looks at the whole picture as of the retention date.
The majority's reasoning was the treaty-uniformity argument this series has met before: the EU's courts (Mercredi, A v A), the UK, Australia and New Zealand had already converged on the all-circumstances view, and the US Supreme Court would join two years later in Monasky (article #2). A convention shared by many states works only if its central term means the same thing everywhere. Balev put Canada inside the consensus — and today the hybrid/totality approach is, in effect, the law of the Convention world.
The dissent deserves its paragraph. Three justices would have held that for time-limited stays, the parents' agreement should be decisive: the children were in Canada on Germany's terms, and their growing Canadian roots were the fruit of a consent given precisely because it had an end date. The dissent's warning was structural: under the hybrid approach, a parent who retains and then litigates slowly lets the child's acclimatization accumulate into the very facts that defeat return. It is the concealment premium (article #15) and the settlement spiral (articles #1, #5) wearing a new coat: time serves the retainer. The majority's answer — courts must decide these cases fast, so acclimatization never gets the chance to decide them — is correct, and it is precisely the discipline the global data shows most systems failing to deliver.
Case Study Analysis — why retention is the coming storm
Two forces make retention the field's growth area. First, the pandemic: the 2021 study's authors observed that COVID-era travel restrictions made removals harder but likely produced more retentions — families stranded or choosing not to return, with the study's application dip and rebound tracking that dynamic. Second, remote work: the post-2020 normalization of "working from anywhere" multiplies agreed temporary stays abroad — and every one of them carries a Balev clause inside it. The school-year-abroad, the six-month family visit, the "let's try living near my parents" experiment: these are the wrongful-retention dockets of the next decade. (This second point is analysis, not a sourced statistic.)
What This Shows About the Limits of the Hague Convention Alone
Balev shows the treaty working as intended at the doctrinal level — a hard question answered, and answered in step with the rest of the world — and yet failing the family at the human level, because it took four years. The limit is not the rule but the clock: the hybrid approach is only fair if courts decide fast, before the child's acclimatization (which the approach must weigh) has been manufactured by delay. And the ending teaches the treaty's honest boundary: a Hague case decides the forum, not the outcome. The Convention can bring a case home; it cannot promise the home court will agree with the parent who invoked it.
What Parents and Professionals Should Understand
Two practical lessons, both prompts to consult a qualified lawyer rather than legal advice. First, a consent letter is a boundary, not a formality — dates, return flights, the express words "temporary" and that habitual residence remains in the home country, schooling limited to the period, and renewal only in writing. The father's documents in Balev were good; they made his case arguable for four years. Vague consent makes it unwinnable. Second, act before the date, not after it: the moment signals appear that the child will not come back — school re-enrolment abroad, apartment leases, statements of intent — is the moment to seek advice, because several jurisdictions recognize anticipatory (repudiatory) retention, and all jurisdictions reward early filings. Waiting for the deadline wastes the weeks that decide hybrid-approach cases.
Limitations
This is a case study of one leading judgment; the hybrid approach is applied with local emphases across jurisdictions, and repudiatory retention is a developing doctrine. The post-return German proceedings and the children's ultimate residence are summarized from the case record and commentary and flagged for confirmation. The remote-work forecast is the article's own analysis. Statistics are from the HCCH global study.
Conclusion
Between 2018 and 2020, the supreme courts of Canada and the United States, following Europe, gave the Convention's most litigated concept one worldwide meaning — a quiet triumph in a field this series has often shown fragmenting under pressure. But Balev's deeper lesson is the honest one: the treaty decides who decides, not who wins, and it does so only as fairly as it does quickly. For the growing number of families whose lives cross borders for a season, the case is a warning to write the consent — and to act the day the season is over.
Frequently Asked Questions
What is "wrongful retention"? It is keeping a child abroad beyond an agreed period without the other parent's consent — for example, after a school year or holiday that both parents agreed would be temporary. Unlike a removal, it begins lawfully; the wrong crystallizes when the agreed period ends.
What is the "hybrid approach" to habitual residence? The rule adopted in Balev: a court decides where a child was habitually resident by weighing all relevant circumstances — the parents' intentions and the child's actual links (school, friends, language, duration) — rather than parental intention alone.
Did Balev decide who the children should live with? No. The Hague question was whether the children should be returned to Germany for its courts to decide custody. A Hague case decides the forum, not the final parenting outcome — and in this case the home-country proceedings, not the Hague order, ultimately shaped where the children lived.
How can I protect myself when sending my child abroad temporarily? Consult a lawyer, and put the temporariness in writing: exact dates, return flights, a statement that the child's home remains in the origin country, and renewal only by written agreement. Act quickly if it becomes clear the child will not be returned.
References & sources
- Office of the Children's Lawyer v. Balev, 2018 SCC 16, [2018] 1 S.C.R. 398 — CanLII full text: https://www.canlii.org/en/ca/scc/doc/2018/2018scc16/2018scc16.html
- Supreme Court of Canada, Case in Brief: Office of the Children's Lawyer v. Balev: https://www.scc-csc.ca/pdf/cb/2018/37250-eng.pdf
- Federal Judicial Center, Case Commentary: Office of the Children's Lawyer v. Balev: https://www.fjc.gov/content/343031/office-childrens-lawyer-v-balev-case-analysis
- Gowling WLG, "Habitual residence": SCC revamps Hague Convention analysis with hybrid approach (2018): https://gowlingwlg.com/en/insights-resources/articles/2018/scc-adopts-new-approach-to-habitual-residence
- Monasky v. Taglieri, 589 U.S. 68 (2020) (this series, article #2); CJEU Mercredi v Chaffe, C-497/10 PPU (2010) — the international convergence.
- N. Lowe & V. Stephens, HCCH Prel. Doc. 19A (Sept 2024) — COVID retention dynamics (para 29) and timing data: https://assets.hcch.net/docs/a75d7234-deb9-4764-be72-a4a9d87c8af7.pdf