How to Check if a Citation Is Real
Updated November 6, 2026
To check if a citation is real, look it up somewhere other than where you found it. Paste the DOI into doi.org and see if it opens the same paper. If there’s no DOI, search the exact title in Crossref and Google Scholar. Then compare the authors, year, journal, and pages.
If you can’t find it in any of those places, don’t use it unless a librarian can track it down.
Why fake citations happen
AI chatbots can write citations that look perfect and lead nowhere. They build text from patterns, so they can pair a real journal with a title that only sounds right. Unless the tool looked the paper up, nothing guarantees the paper exists.
A 2023 study in Scientific Reports measured this. The researchers had two versions of a chatbot write short reviews on 42 topics. Then they checked all 636 citations. For the older version, 55% of the citations were made up. For the newer version, 18% were. Many citations to real papers had errors, too.
AI tools keep changing, so those numbers may not match today’s tools. You still need to check. The steps below show you how, and our guide to using AI for research covers the bigger picture.
Step 1: Test the DOI
A DOI is a permanent ID for a paper. If you’re new to them, read what a DOI is.
- Copy the DOI from the citation.
- Paste it after
https://doi.org/in your browser’s address bar. - Look at what opens.
| What you see | What it means |
|---|---|
| A “DOI not found” page | The DOI is wrong, was copied wrong, or isn’t active yet |
| A different paper | Big red flag. The DOI doesn’t belong to this citation. |
| The same paper | Good sign. Move on to comparing the details. |
Try it with this citation. It looks normal, right?
Harper, Lena, and Jon Cole. “Sleep Debt and Memory in First-Year Students.” Journal of Student Wellness, vol. 14, no. 2, 2021, pp. 88-103, https://doi.org/10.1234/jsw.2021.0142. (made-up example)
We wrote that one ourselves. If you open the link, doi.org says it can’t find the DOI.
Now try a real one. This link opens a 2014 paper from Psychological Science on taking notes by hand: https://doi.org/10.1177/0956797614524581.
A “not found” page doesn’t prove a paper is fake. Someone may have typed the DOI wrong, so go on to Step 2.
Step 2: Search the title in Crossref
Crossref is a not-for-profit group that registers DOIs for publishers. You can search it for free.
Paste the full title in the search box and look for an exact match. If you have a whole list of references, try Crossref’s Simple Text Query. You paste in the list, and it looks for matching DOIs.
Crossref doesn’t hold everything. Many books, older works, and web pages aren’t in it. A miss here means “keep checking,” and it doesn’t mean “fake.”
Step 3: Search Google Scholar
Go to Google Scholar and put the full title in quotation marks. Then click through to the publisher’s page, or to a PDF if there is one.
Watch for results marked [CITATION]. That label means Scholar has no online copy, and it often found the title in other papers’ reference lists. Treat those results as leads, and look for the paper itself. Our guide on using Google Scholar has more tips.
Step 4: Compare every detail
A title match isn’t enough. Some fake citations mix real pieces, like a real author paired with a paper that author never wrote. Line up each part with the record you found.
| Check this | What to look for |
|---|---|
| Authors | The same names in the same order |
| Year | The same year, though online and print dates can differ by a year |
| Title | The same words. A similar topic doesn’t count. |
| Journal | The same journal name |
| Volume, issue, and pages | The same numbers |
| DOI | It opens this paper |
If the numbers look off, go to the journal’s website and open that issue. If the paper isn’t in the table of contents, something in the citation is wrong.
For a first pass, you can run citations through the free citation checker from Sourcefox. Then check anything odd by hand.
Step 5: Read the paper
A real paper can still be the wrong citation. Writers and AI tools both attach real papers to claims those papers don’t make. Find the page that supports your point. If you can’t find it, don’t cite the paper for that point.
Also make sure the paper hasn’t been retracted, which means pulled by the journal. The Lancet retracted a 1998 paper in 2010. Its DOI still works, and its title in Crossref now starts with “RETRACTED.” To check a paper, search its title with the word “retraction” and look at its page on the journal’s site.
What to do if a citation is fake
- Take it out of your paper. Don’t guess at a fix.
- Find a real source that supports your point, or rewrite the point.
- Check the rest of the list if the citation came from the same place.
- Ask a librarian if you’re still not sure.
Common questions
Can a fake citation have a real DOI?
Yes. The DOI might belong to a different paper. That’s why you should compare the title and authors on the page that opens.
Does a missing DOI mean a citation is fake?
No. Many books, news stories, and older works don’t have one. Search the title in your library’s catalog and in Google Scholar.
Who can help me check a citation?
A college librarian can. Most libraries offer chat or email help, and librarians can search databases you may not know about.