How Do I Check Whether an AI Citation Is Real?

1. Find the original source

Start with one sentence you plan to share or use. Copy it along with its citation, then open the link. Look for the original report, article, or official page. If the link opens a search page or a list of references, follow it to the item the answer actually cites.

If the link is broken or missing, search a distinctive part of the title with the author or organization. For a paper, look up the DOI, a digital identifier for a publication or other item. Crossref offers tools to match references to DOIs and see details such as titles and dates for its records. Crossref metadata retrieval

A paywall, moved page, or incomplete reference can make a genuine item hard to find. If you still cannot confirm it, mark it as unverified. You can look for a different source you can read.

2. Check that the citation names the right item

Compare the citation against the source you opened. Check the title and author or organization first, then the year, journal, edition, or DOI where applicable. A DOI that opens a different article leaves you with a mismatch. If you can trace the intended item independently, fix the reference and check the claim against that item.

A citation is like an ingredient label. A convincing label helps you locate what the cook meant to use. You still have to open the jar to see what you have. The NIST generative AI risk profile identifies invented citations as a form of confabulation, commonly called a hallucination.

3. Read for the exact claim

Find the passage that deals with the sentence you copied. Use a distinctive word or number to search the page, then read the surrounding lines. Compare what was measured, who or what it applies to, and the date or units. A source may support a narrower sentence or point in a different direction. For a study, look at its methods and findings if the summary leaves those details unclear.

Imagine a chatbot says, “Mars orbits the Sun in about 24.6 hours,” and cites NASA. That sentence is deliberately wrong for this exercise. The NASA page is real and contains the number. In the Orbit and Rotation section, 24.6 hours describes one rotation on Mars’s axis. A year on Mars lasts about 687 Earth days. The sentence used the correct number for the wrong motion. NASA Mars Facts

Even when an answer uses AI grounding to draw on source material, you can check how it used each source. Record the relevant passage or section beside the claim so you can explain your decision later.

What should I do when the check fails?

If the source supports the exact wording, keep the claim and cite the source you read. If it supports a smaller claim, rewrite the sentence to fit the evidence. If the passage contradicts the claim, correct it using the passage. If you cannot locate or read enough of the source, set the claim aside until you find adequate support.

For a longer answer, begin with the numbers, quotes, and claims your decision depends on. Keep each claim beside the source you checked. Use the same habit when checking other AI outputs in the AI literacy guide.