Why it happens, how to spot it, and the one rule that prevents it
If you ask an AI assistant for legal help, sooner or later it will hand you a case name, a court, and a year that sound exactly right — and that do not exist.
It is not lying to you. It finishes patterns. A legal citation is a pattern. So it produces something shaped like the citations it has seen, whether or not that case was ever decided by anyone.
By the middle of 2026, courts around the world had written decisions about AI-invented citations in more than 1,900 cases. In the United States, more of them involved people representing themselves than involved lawyers — 1,111 against 761.
AI makes your filing look better while making it weaker.
A study of federal court filings found that filings which appeared AI-assisted were more polished and cited more cases than filings that did not — and were dismissed earlier. Sounding like a lawyer is not the same as having a case, and judges can tell the difference faster than you would expect.
This is the whole reason this project starts with your evidence instead of your argument.
It sounds exactly like what you hoped for. A case with your facts, in your state, that came out the way you want. Real law is rarely that tidy. When the answer is too good, that is the moment to check, not the moment to relax.
Never put a case in anything you send or file unless you have opened it and read it yourself. Not the AI's summary of it. The case.
That single rule closes off almost the entire problem.
Search the citation at courtlistener.com. It holds over nine million decisions from more than two thousand courts.
Two honest warnings about what "not found" means:
So treat "not found" as "I have not verified this," and treat unverified as unusable. That is enough. You do not need to prove it is fake to decide not to use it.
It is genuinely good at the thing this method is built on: organizing what you already have.
Do not ask it what the law is and then repeat the answer to a judge.