Predatory journals share a core set of features: they present false or misleading information, ignore standard editorial practices, lack transparency, and send indiscriminate solicitation emails. An international consensus group of publishing experts settled on this definition, deliberately excluding peer review quality because it’s too subjective to measure from the outside. What you can measure, though, are dozens of concrete red flags on a journal’s website, in its emails, and in publicly searchable databases.
What Makes a Journal “Predatory”
The term describes journals that prioritize collecting fees over publishing credible research. They mimic the appearance of legitimate academic publishing, complete with professional-looking websites, official-sounding names, and claims of rigorous review processes, but deliver little or none of the quality control that gives published research its value. The damage is real: papers published in predatory journals carry no credibility, can’t reliably be cited by other researchers, and may permanently stain an author’s reputation.
Red Flags on the Journal’s Website
Start with the journal’s homepage. Legitimate journals clearly display their editorial board, peer review process, publication fees, and contact information. Predatory journals often obscure or fabricate these details. Here’s what to look for:
- Suspiciously fast peer review. Genuine peer review typically takes at least three months. If a journal promises acceptance in days or weeks, that review is either superficial or nonexistent.
- Fake or unverifiable editorial boards. Predatory journals list board members who don’t exist, lack credentials relevant to the journal’s topic, have affiliations that can’t be verified, or are real researchers who don’t know they’ve been listed. Cross-check a few names: search for them at the institutions claimed and see if their published work matches the journal’s scope.
- Vague peer review descriptions. A trustworthy journal specifies whether it uses single-blind, double-blind, or open review, how many reviewers evaluate each paper, and whether those reviewers are external experts. If the website says nothing beyond “peer reviewed,” that’s a warning sign.
- False indexing claims. Predatory journals frequently claim to be indexed in PubMed, Scopus, or Web of Science when they aren’t. Some exploit a technicality: if one article happens to appear in PubMed Central because it was NIH-funded, the journal may claim PubMed indexing for the entire publication.
- Impact factor manipulation. Displaying impact factors or ranking metrics from obscure or made-up services is a common tactic. The Directory of Open Access Journals (DOAJ) explicitly rejects journals that reference unreliable ranking metrics on their websites.
- Intrusive advertising or a cluttered, unprofessional site. Broken links, grammatical errors in editorial policies, and ads unrelated to academic publishing all signal a journal that hasn’t invested in legitimate operations.
Red Flags in Solicitation Emails
If you’ve published even once, you’ve likely received unsolicited emails from journals inviting you to submit. Legitimate journals rarely cold-email individual researchers with flattering requests to publish. Predatory journals do this aggressively, often repeatedly, even when you don’t respond. The emails typically address you by name but reference your work only vaguely, or they invite you to submit in a field that doesn’t match your expertise at all. Urgent language like “submit within 48 hours” or promises of guaranteed acceptance are clear giveaways.
How to Verify Indexing Claims
Never trust a journal’s own claims about where it’s indexed. Verification takes only a few minutes using free tools.
For Web of Science, search the journal title in Clarivate’s Master Journal List (mjl.clarivate.com). This covers the Web of Science Core Collection along with specialty databases like Biological Abstracts, BIOSIS Previews, and Zoological Record. If the journal doesn’t appear, it isn’t indexed there regardless of what its website says.
For Scopus, use Elsevier’s “Sources” tool on the Scopus website, which lists every journal currently in the database. For PubMed, search the NLM Catalog at the National Library of Medicine. And for open access journals specifically, check the Directory of Open Access Journals at doaj.org. DOAJ has rigorous inclusion criteria: journals must publish at least five research articles per year, have a named editor and editorial board with verifiable affiliations, use peer review (or in certain humanities disciplines, editorial review by at least two editors), and provide full-text access to every article at a unique, permanent URL.
You can also verify a journal’s ISSN, the standard serial number assigned to periodicals, through the ISSN International Centre portal at issn.org. A legitimate journal’s name and ISSN should match what’s registered there. If a journal displays an ISSN that doesn’t correspond to its title, or doesn’t display one at all, that’s a serious red flag.
Lists and Databases That Track Predatory Journals
The most well-known resource is Beall’s List, originally created by librarian Jeffrey Beall in 2008. He took it down in 2017, likely in response to legal pressure from listed publishers. Anonymous scholars now maintain and update the list on a separate platform, with the most recent update in late 2024. It remains publicly accessible and widely referenced, but its updates are sporadic and its curation less systematic than it once was.
Several alternatives have emerged. Kscien’s List, launched in 2020 by a nonprofit research organization in Iraq’s Kurdistan region, is managed by a committee of 25 researchers and updated daily, making it one of the most actively maintained public lists available. Cabell’s Journalytics (formerly Cabell’s Blacklist) offers a comprehensive database but requires a paid subscription, so it’s most useful through a university library that carries it. The Norwegian Register for Scientific Journals (Kanalregister), maintained by a governmental body, is publicly available and updated annually.
No single list is comprehensive. A journal’s absence from a predatory list doesn’t guarantee it’s legitimate, and inclusion on a list doesn’t always mean a journal is irredeemably fraudulent. Use these lists as one input alongside your own verification.
The Think. Check. Submit. Checklist
The Think. Check. Submit. campaign, endorsed by major publishing organizations including the Committee on Publication Ethics (COPE), provides a structured set of questions to evaluate any journal before you submit. The key questions distill into three areas:
First, familiarity: Do you or your colleagues know this journal? Have you read articles published in it? Is the journal’s name unique and not easily confused with a more established title?
Second, transparency: Is the publisher’s name clearly displayed? Can you contact them by phone, email, and postal address? Does the website explain its peer review process, including how many reviewers assess each paper and whether they’re independent experts in your field?
Third, credibility: Is the journal indexed in a recognized database? Is the publisher a member of a professional trade association? Can you verify the journal’s information in the ISSN portal? For open access journals published in Latin America, the Caribbean, Spain, or Portugal, is it indexed in Redalyc?
If a journal fails on more than one of these checks, it’s worth walking away.
What to Do If You’ve Already Submitted
Withdrawing a paper from a predatory journal is difficult, and success isn’t guaranteed. Once you’ve submitted, and especially if you’ve signed a publishing agreement or paid an invoice, you may have signed over your copyright, which limits your legal options.
The recommended approach is for every co-author to individually contact the publisher, the journal’s editor-in-chief, editorial board members, and any known reviewers to request retraction. Use email, phone, and certified mail. Do not sign any new agreements with the publisher during this process.
Predatory publishers often demand withdrawal fees or simply stop responding. If you’re considering paying a withdrawal fee, get written confirmation first that the publisher will return your copyright, remove the article from their servers, and not post it in the future. Even then, payment doesn’t guarantee compliance, so save every piece of correspondence, every signed agreement, and every invoice. University librarians and research integrity offices can help you navigate the specifics of your situation.
If you can’t get the article retracted and you’ve forfeited copyright, the paper may effectively be lost. You generally cannot resubmit the same work to a legitimate journal while it remains published elsewhere, even in a predatory outlet.