If a decision can uproot your life, it owes you real reasons: Mason v. Canada on the standard of review

The short answer: Mason v. Canada (Citizenship and Immigration), 2023 SCC 21, is the Supreme Court of Canada’s leading case on how Vavilov applies to immigration decisions. It confirms that courts review those decisions for reasonableness, and it applies a rule that matters in every serious file: when a decision has harsh consequences for the person, such as removal from Canada or separation from family, the reasons must reflect those stakes. A tribunal that ignores the person’s central arguments, the broad consequences of its reading of the law, or Canada’s international obligations has made an unreasonable decision.

Judgment was given on September 27, 2023. Justice Jamal wrote for seven judges; Justice Côté agreed with the result but would have used a different standard of review.

The facts: a “security” ground used for violence that had nothing to do with security

Earl Mason, a citizen of Saint Lucia, came to Canada in 2010. He is married to a Canadian citizen, has two daughters here, and had applied for permanent residence under his wife’s sponsorship. In 2012, at a concert in a bar in Surrey, British Columbia, a man broke a beer bottle over his head. Mr. Mason drew a gun and fired, wounding two people. He was charged with attempted murder, but in 2015 the charges were stayed for delay. He was never convicted of anything (paras. 13–14).

The Canada Border Services Agency then reported him inadmissible on security grounds under section 34(1)(e) of the Immigration and Refugee Protection Act (IRPA): “engaging in acts of violence that would or might endanger the lives or safety of persons in Canada.” The other grounds in section 34 are espionage, subversion, terrorism, danger to the security of Canada and membership in organizations that do those things (para. 15).

The second appellant, Seifeslam Dleiow, a citizen of Libya whose refugee claim had been refused, was reported under the same provision for violence against intimate partners. Most of his charges were stayed; he pleaded guilty to three and received a conditional discharge (paras. 17–18).

The rule: harsh consequences call for stronger reasons

Before looking at the tribunal’s reasons, the Court set out the standard they had to meet. Drawing on Vavilov, Justice Jamal wrote that “[w]here the impact of a decision on an individual’s rights and interests is severe, the reasons provided to that individual must reflect the stakes.” Under this principle of responsive justification, if a decision has “particularly harsh consequences for the affected individual,” the decision maker “must explain why its decision best reflects the legislature’s intention,” and a decision can be unreasonable if it fails to grapple with those consequences (para. 76).

He then applied it to these appellants. The case would decide whether two people, one of whom had never been convicted of any crime, could be deported. People facing deportation may experience “any number of serious life-changing consequences,” including dislocation or permanent separation from family. “The IAD’s reasons must reflect these stakes” (para. 81).

This does not lower the bar for the applicant or decide the outcome. It raises what the reasons must show. A short, generic explanation might do for a low-stakes decision. It will not do for a decision that ends someone’s life in Canada.

Three things the tribunal failed to deal with

The Court found the Appeal Division’s decision unreasonable because of three omissions, which together were enough (paras. 85 and 118):

1. Arguments the person actually made. Mr. Mason raised two points of statutory context in his written submissions. The tribunal dealt with some of his arguments but not these, which “casts into doubt whether it was alert and sensitive” to them. Reasons are how a decision maker shows it “actually listened” (para. 97).
2. The broad consequences of its reading. Because section 34 only needs “reasonable grounds to believe” (IRPA s. 33), not proof beyond a reasonable doubt, the tribunal’s reading would turn domestic altercations, “bar fights and schoolyard fights” into one of the gravest kinds of inadmissibility, even without a conviction. It would also bypass the protection Parliament gave young offenders in section 36(3)(e). The tribunal never addressed either point (paras. 99–103).
3. International law. Section 3(3)(f) of the IRPA requires the Act to be read in line with Canada’s international human rights obligations. A broad reading of section 34(1)(e) could send people to countries where they may face persecution, contrary to the non-refoulement rule in Article 33 of the Refugee Convention, which the Court called “the cornerstone of the international refugee protection regime.” That this argument was never put to the tribunal, and that neither man was a refugee claimant, made no difference: Parliament requires the point to be considered (paras. 104, 115 and 117).

The Court also refused to let the Federal Court of Appeal fill the gaps. That court had read the tribunal’s reasons as limiting the provision to serious threats to life, but the tribunal never said that. A reviewing court cannot “substitute its own justification for the outcome” (para. 101).

Why the Court did not send the case back

The usual remedy for an unreasonable decision is to send it back for a new decision. Here the Court held that the legal constraints “point overwhelmingly to only one reasonable interpretation”: section 34(1)(e) applies only to acts of violence with a link to national security or the security of Canada. Since no such link was alleged and the Minister relied on no other ground of inadmissibility, there was nothing left to decide. The Immigration Division’s original decision in Mr. Mason’s case was restored, and Mr. Dleiow’s deportation order was quashed (paras. 121–123).

The Court stressed that a “single reasonable interpretation” is a conclusion a court can reach at the end of a proper review, not a starting point (para. 71). It also held that when the Federal Court certifies a question for appeal under IRPA section 74(d), that does not switch the standard to correctness (para. 48). Justice Côté disagreed on that point and would have answered certified questions on a correctness standard.

What Mason means for your refusal or removal file

• The higher the stakes, the more the reasons must show. Removal orders, inadmissibility findings, humanitarian and compassionate refusals, sponsorship refusals that keep a family apart, and refugee-related decisions are where responsive justification matters most.
• Put your arguments in writing. Mr. Mason won largely because the tribunal ignored arguments he had made in his written submissions. A point never raised is much harder to fault an officer for missing. This is why responses to procedural fairness letters and written submissions deserve real care.
• Read the officer’s notes, not just the letter. The reasons usually sit in the GCMS notes. The question is whether they engage with what you said and with the consequences for you, not just whether they tick boxes. How we review a refusal.
• Consequences must be weighed, not mentioned. A sentence acknowledging family hardship is not the same as explaining why the decision is justified despite it.
• Deference survives. Courts still defer on facts and evidence, and most refusals that reach Federal Court are not overturned. Mason is a demand for justification, not a guarantee of a different result.
• Deadlines do not bend. A Federal Court application for leave and judicial review is generally due within 15 days of a decision made in Canada and 60 days for one made outside Canada. Use the refusal navigator to see your forum and clock.

If you have been refused, start with the reconsideration checklist or the refusal checklists for visitor, study and work files. For the wider picture of how the Supreme Court shaped refugee hearings, see five SCC decisions on refugee protection.

Bring the decision. We will tell you what it says.

Our Brampton and London offices read refusal letters and officer notes against the standard in Vavilov and Mason, tell you whether the reasons hold up, and refer you to counsel when a Federal Court challenge is the right route. Request a consultation while the deadline is still open.

Sources: Supreme Court of Canada, Mason v. Canada (Citizenship and Immigration), 2023 SCC 21 and Case in Brief; Canada (MCI) v. Vavilov, 2019 SCC 65; IRPA, sections 33–34. Paragraph numbers refer to Justice Jamal’s majority reasons. General information only, not legal advice. CHK Immigration Services is a firm of licensed immigration consultants; Federal Court proceedings are conducted by lawyers.