Verified
The quoted law matches the cited authority.
Verify legal citations before filing.
LawEngine checks whether quoted law matches the cited authority in the primary-source corpus before it reaches the court.
Legal citation checkerPrimary-source verificationBuilt for briefs and motionsCheck AI drafts before filing
See it work
Brief excerptReady
Under the Illinois Code of Civil Procedure, "a plaintiff may not obtain a default judgment unless the plaintiff has filed an affidavit showing the nature and amount of the damages" 735 ILCS 5/2‑1301(d). The plaintiff’s failure to file the required affidavit prior to the default hearing renders the judgment void.
↻ Found elsewhere
Deterministic · No LLMCited735 ILCS 5/2‑1301(d)
CollectionIllinois Compiled Statutes
Actually in735 ILCS 5/2‑1302
AI in pathNone
Why this matters
Wrong citation, wrong law, wrong outcome.
In legal work, one bad citation can mean the wrong rule, the wrong authority, or a filing that collapses under scrutiny. AI drafting makes that risk larger, not smaller. Checking every quote by hand is slow. LawEngine automates the source check against the actual law.
LawEngine is the citation-checking layer for legal AI.
How verification works
Check the quote. Check the cite. See the evidence.
The public verifier answers the filing question attorneys actually have: does the quoted law match the authority being cited?
1
Paste
Drop in legal text from a brief, motion, or AI draft that includes a citation and quoted law.
2
Match
LawEngine resolves the cited authority and checks the quoted text against the cited source and the broader primary-source corpus.
3
Evidence
You see whether the citation is verified, found elsewhere, or unsupported before anything gets filed. No confidence score.
Three possible verdicts
Every claim gets one of these independent verdicts. They are not stages or a sequence.
Found elsewhere
The quoted law exists in the corpus, but under a different citation.
Not found
The quoted law was not found in any indexed authority in the live corpus.
Benchmark
We publish citation-checking accuracy. So does the best AI.
The Citation Benchmark is a public test of legal citation checking: does the quoted passage actually match the cited source? Same 500 questions, same grading. The results speak for themselves.
LawEngine reference run
100%
Deterministic verification lane
Deterministic verification against primary sources. No AI sits in the verification path.
Frontier AI baseline
72%
GPT-5.4-mini on the same public pack
Roughly 3 out of 10 citation checks wrong on this task.
Coverage
Built deep in Illinois. Designed to scale across jurisdictions.
Illinois is the deepest public proof today: statutes, administrative code, court rules, constitutions, and selected federal authority with deterministic verification. Sweden Proof shows that the same source-grounded checking method can move across legal systems without losing traceability or rigor.
295K+
Provisions indexed
Statutes, rules, regulations, and constitutional provisions across the public corpus.
64
Source collections live
Primary-source collections supporting the current public verification surface.
176K+
Authorities with deterministic verification
Illinois leads the public proof today while broader coverage expands carefully.
Mission
Legal AI needs a citation-checking layer tied to the source.
Legal AI will write more of the work product that reaches courts, agencies, and clients. If the citations inside that work cannot be checked against the source, the output becomes harder to trust at the exact moment trust matters most. LawEngine exists to keep briefs, motions, and legal research anchored to the law they claim to rely on.
Contact
Get in touch.
If you want early access, a demo, or a conversation about citation checking for legal AI, reach out.