What are the facts?
The petitioner, Carol Sosna, moved to Iowa and sought to file for divorce before she had resided in the state for one year. Iowa law required a would-be divorce petitioner to have been a resident for at least one year before filing. As a result, the state court clerk refused to accept her petition. Sosna then brought a federal class action under Federal Rule of Civil Procedure 23 on behalf of herself and all others similarly situated—namely, persons who had resided in Iowa for less than one year and who wished to file actions for dissolution of marriage—seeking declaratory and injunctive relief against enforcement of the one-year durational residency requirement. A three-judge district court certified the class under Rule 23(b)(2), held the Iowa statute unconstitutional on Fourteenth Amendment grounds (including the right to travel and equal protection), and enjoined its enforcement statewide. The State appealed directly to the Supreme Court under 28 U.S.C. § 1253. By the time the case reached the Supreme Court, the one-year period had elapsed, mooting Sosna's individual need for relief, but the injunction and class certification remained in effect.
What is the legal issue?
1) Whether a class action challenging Iowa's one-year residency requirement for filing a divorce action became moot when the named plaintiff's personal claim became moot after class certification; and 2) Whether Iowa's one-year durational residency requirement for access to its divorce courts violates the Fourteenth Amendment by infringing the constitutional right to travel or denying equal protection and due process.
What rule applies?
Article III mootness: In a properly certified class action, the case does not become moot when the named plaintiff's individual claim becomes moot after certification; the class acquires a legal status independent of the named plaintiff, and a live controversy persists so long as class members continue to be affected. Substantive constitutional law: A state may impose a reasonable durational residency requirement before allowing access to its divorce courts when the requirement serves legitimate and substantial state interests—such as establishing domicile to ensure jurisdiction, promoting the integrity and recognition of decrees under the Full Faith and Credit Clause, and deterring migratory divorces—without unconstitutionally burdening the right to travel or violating equal protection or due process.
What did the court hold?
1) The action was not moot despite the named plaintiff's personal claim becoming moot after class certification; the certified class continued to present a live controversy. 2) Iowa's one-year residency requirement for filing a divorce action is constitutional; it does not violate the Fourteenth Amendment or impermissibly burden the right to travel.
What is the reasoning?
On mootness, the Court explained that a class action, once properly certified under Rule 23, attains a legal status separate from the interest of the named representative. Although Sosna's personal need for relief ended when she satisfied the residency period, the class she represented contained unidentified members who still faced the one-year bar, and the controversy remained live as to them. There was an actual case or controversy at the outset, and the district court's certification ensured adequate representation and preserved the adversarial context. Thus, Article III did not require dismissal after certification merely because the representative's individual claim had become moot. On the merits, the Court upheld Iowa's one-year durational residency requirement for divorce filings. The state's interests included ensuring a genuine nexus between the forum and at least one spouse (i.e., domicile) so its courts possessed jurisdiction over the marital res and so that its decrees would be respected by sister states under the Full Faith and Credit Clause. The waiting period also helped deter "migratory divorces," administrative burdens from transients, and potential forum shopping. The Court distinguished cases like Shapiro v. Thompson (striking down a one-year residency requirement for welfare) and Dunn v. Blumstein (invalidating residency requirements for voting) on the ground that those laws penalized the exercise of the right to travel by denying basic necessities or a fundamental political right to new residents. By contrast, Iowa's law merely delayed access to a divorce forum rather than depriving new residents of a necessity or a fundamental political right; it did not create a permanent barrier or a suspect classification. The Court also distinguished Boddie v. Connecticut, which barred states from conditioning access to divorce on payment of court fees by indigents. Unlike a fee barrier, the Iowa rule did not foreclose access entirely; it imposed a limited waiting period reasonably related to legitimate state purposes. Given those interests and the modest temporal delay, the requirement did not impose an unconstitutional burden on the right to travel or violate equal protection or due process.
Why is this case significant?
Sosna is a bedrock case for the mootness doctrine in class actions: once a class is certified, subsequent mootness of the named plaintiff's claim does not moot the class claims. It also provides a template for analyzing durational residency rules under the Fourteenth Amendment, marking a limit to the right-to-travel jurisprudence of Shapiro and Dunn and refining Boddie's access-to-courts rationale. For Civil Procedure, it underscores the procedural consequences of Rule 23 certification; for Constitutional Law, it illustrates judicial deference to state domestic-relations administration when reasonable and supported by substantial interests.
What were the two principal issues in Sosna v. Iowa?
First, whether the case became moot when the named plaintiff's personal claim ended after class certification; second, whether Iowa's one-year residency requirement for filing a divorce action violated the Fourteenth Amendment by burdening the right to travel or denying equal protection and due process.
How did the Court resolve the mootness question in the class action context?
The Court held that once a class is properly certified, the action does not become moot when the named plaintiff's individual claim becomes moot. The class has an independent legal status, and a live controversy persists as to unnamed members who continue to be affected by the challenged policy.
Why did the Court uphold Iowa's one-year residency requirement for divorce filings?
The Court found the requirement reasonably related to legitimate and substantial state interests: ensuring domicile and jurisdiction, promoting the integrity and interstate recognition of divorce decrees, deterring migratory divorces, and managing court administration. The rule imposed a delay, not a permanent bar, and thus did not unconstitutionally penalize the right to travel.
How did Sosna distinguish cases like Shapiro v. Thompson and Dunn v. Blumstein?
Shapiro and Dunn invalidated residency requirements because they penalized new residents by denying essential benefits or fundamental political rights (welfare and voting). In contrast, Iowa's divorce residency rule imposed only a temporary delay and served jurisdictional and administrative aims, so it did not constitute an unconstitutional penalty on interstate migration.
What is the relationship between Sosna and Boddie v. Connecticut on access to divorce courts?
Boddie held that due process prohibits absolute denial of access to divorce courts based on indigency and filing fees. Sosna clarified that a state may still impose a reasonable, nonfinancial, time-limited residency requirement that serves substantial state interests; such a requirement does not foreclose access altogether and is therefore permissible.