How to check AI legal citations

Why AI tools get citations wrong

A large language model writes the most likely next words given its training and the text in front of it. A citation is just more text to the model: a plausible section number, case name or neutral citation can be produced whether or not that authority exists or says what the answer claims. This is usually called hallucination.

Tools that retrieve real sources before answering (retrieval-augmented generation) reduce the problem but do not remove it. The model can still misread a provision, rely on a superseded version, apply law from the wrong jurisdiction, or attach a correct citation to a proposition the text does not support.

Courts in England and Wales have addressed this directly. In R (Ayinde) v London Borough of Haringey and Al-Haroun v Qatar National Bank [2025] EWHC 1383 (Admin), the Divisional Court said freely available generative AI tools are not capable of reliable legal research, and that lawyers who use AI for research have a professional duty to check it against authoritative sources before relying on it.

The five-step checklist

1. Open the official sourceFind the provision or judgment yourself at the official publisher, not through the AI’s summary or a secondary site. Use the sources listed below.
2. Confirm it was in force on the relevant dateCheck whether the provision is in force, amended, repealed or not yet in force, and which version applied on the date that matters to your matter. Consolidated texts can lag behind amendments, so read the publisher’s notes on outstanding changes.
3. Confirm the quoted wordsIf the answer quotes or paraphrases the text, find those words in the provision. A quotation that cannot be found is a warning sign for the whole answer.
4. Confirm the propositionRead the provision in context (definitions, exceptions, related sections) and ask whether it supports the point the answer makes. A real citation attached to the wrong proposition is the hardest error to spot.
5. Record the checkNote what you opened, the version and date, and who checked it. A short file note makes supervision and later review straightforward.

Where to check: official sources

Reputable publishers’ databases are also authoritative for this purpose. A search engine result, a blog post or another AI tool is not.

Red flags that need a closer look

• A case name or neutral citation that returns nothing at the official source.
• A section number that exists but deals with a different subject.
• A quotation you cannot find in the text.
• An answer that never says which version or date of the law it used.
• Authorities from another jurisdiction presented as if they applied to yours.
• Several tools agreeing: models can share the same mistake, so agreement is not proof.

How Consilena supports the check

Consilena is built so these steps are quick. Every claim in an answer carries a numbered source that opens the provision itself, from the official publisher, with its jurisdiction, status and date. The work trace shows what was searched and read, and each answer shows the date its law is “as of”.

Consilena does not remove the need to check. Its law library covers selected legislation (see coverage) and has no UK or German case law, so case citations always need checking at the official source. AI output is not legal advice.