Yearly toolset
Citation checker
Paste a brief or memo and the checker finds every citation, checks each case citation's form against The Citation Code, and looks the case up on CourtListener so a mistyped or fabricated citation stands out.
Free trial: 3 checks a day, up to 4,000 characters each, with the first 5 case citations looked up. The yearly toolset checks whole documents.
What it checks
- Form, against the book: court-and-year parentheticals, pinpoints after quotations, reporter abbreviations and spacing, Id. and other short forms. See 14.3: The court-and-year parenthetical
- Existence, on CourtListener: a case citation it cannot find is flagged, and so is a case name that does not match the case at that address. See 1.4: Identity: is it the authority you think it is?
- Quotations and support, for subscribers: the opinion is searched for the words you quote, and an AI review says whether the passage supports your sentence. See 1.6: Support: does the passage say what you say it says?
What it does not do
- It is not a citator. It does not tell you whether a case is still good law or has been reversed. See 1.7: Status: is it still good law, and in force?
- It does not read the sources for you. A case that exists can still be cited for a point it does not make, and an AI assessment can be wrong.
- It is not legal advice, and it does not replace the rules of the court you file in.
One citation to check? Use the citation lookup.
Your text and our sources
Your text is read in memory and is not stored. Its case citations, and for subscribers the quoted words, go to CourtListener to be found; for a subscriber's support review, your sentence and the opinion passage go to Google Vertex AI. We keep only counts of checks and a cache of the case citations looked up, such as 347 U.S. 483.
Case data comes from CourtListener (opens in a new tab), a service of Free Law Project (opens in a new tab). Reporter abbreviations come from Free Law Project's reporters-db, and citations are read with eyecite-ts.