Kansas v. Garcia
In brief
Kansas won: the Court said federal immigration law does not prevent the state from bringing these identity-theft and false-information prosecutions.
- Where it stands
- Decided
Decided 5-4 · March 3, 2020 · Opinion by Justice Thomas
- What it’s about
- Kansas prosecuted several unauthorized workers for identity theft and related state crimes after they used other people’s Social Security numbers on job and tax forms.
- Who it affects
- The ruling lets Kansas pursue these state criminal charges based on W-4 and K-4 tax forms, even when the same false Social Security number appeared on a federal I-9 employment form.
Summary: written with AI from the case record.

What it's about
The case is about whether federal immigration law blocks states from bringing those prosecutions because the conduct overlaps with the federal employment-verification system.
The case addresses how far states may use their own criminal laws when conduct overlaps with the federal system for checking workers' authorization to work.
Question presented
1. Whether IRCA expressly preempts the States from using any information entered on or appended to a federal Form I-9, including common information such as name, date of birth, and social security number, in a prosecution of any person (citizen or alien) when that same, commonly used information also appears in non-IRCA documents, such as state tax forms, leases, and credit applications. 2. Whether the Immigration Reform and Control Act impliedly preempts Kansas's prosecution of Respondents?
What the Court decided
Holding
The Kansas statutes under which respondents were convicted are not expressly preempted. IRCA’s express preemption provision applies only to employers and those who recruit or refer prospective employees and is thus plainly inapplicable. The Kansas Supreme Court instead relied on §1324a(b)(5), which broadly restricts any use of an I– 9, information “contained in” an I–9, and any documents appended to an I–9, reasoning that respondents’ W–4’s and K–4’s used the same false Social Security numbers contained in their I–9’s. Respondents’ argument that Kansas’s laws are preempted by implication is also rejected. 306 Kan. 1113, 401 P. 3d 588 (first judgment); 306 Kan. 1100, 401 P. 3d 155 (second judgment); and 306 Kan. 1107, 401 P. 3d 159 (third judgment), reversed and remanded.
- Result
- Reversed
The vote
From the opinions
“But I do not agree with the majority’s conclusion about implied preemption.”
What's next
The case returns to the Kansas Supreme Court to proceed under the Supreme Court's ruling. The Supreme Court has finished its work in this docket.
Why it matters
The Court rejected both a direct and an indirect claim that federal law blocked the prosecutions.
Documents
Docket activity
New analysis added
AI analysis generated: Case Briefing
AI analysis generated: Decision Record
New analysis added
Opinion added: opinion
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Brief added: Petition
Brief added: Questions Presented
More questions
- What did the Supreme Court decide in Kansas v. Garcia?
- The Court overturned the Kansas Supreme Court and sent the cases back (reversed and remanded). It said federal immigration law did not block the Kansas criminal statutes.
- Why were workers prosecuted in Kansas v. Garcia?
- Kansas brought identity-theft and related charges after workers used other people's Social Security numbers on job and tax forms.
- How did the justices split in Kansas v. Garcia?
- Five justices joined Justice Alito's opinion. Justice Breyer agreed on direct federal blocking but disagreed that Kansas could proceed under the broader indirect-blocking analysis.
- What happens next in Kansas v. Garcia?
- The Kansas Supreme Court receives the cases again and must handle them under the Supreme Court's decision. The Supreme Court's docket action is complete.
Sources
Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.