Predatory journals collect a fee, publish nearly anything, and provide no meaningful peer review. Their damage is durable: a paper published in one cannot be resubmitted elsewhere, and its presence on a CV raises questions about everything listed near it.
The invitation emails have improved considerably. The underlying signals have not.
Check the indexing claim at the index, not the journal
Predatory journals list Scopus, Web of Science, and DOAJ on their homepages routinely. Verify by searching the index’s own site for the journal title or ISSN.
Watch for near-miss impact metrics too. "Global Impact Factor", "Universal Impact Factor", and similar are invented services that sell numbers. The genuine article is Clarivate’s Journal Impact Factor, and it exists only for journals in the Web of Science Core Collection.
Check whether the editorial board is real and consenting
Pick two board members and search their institutional pages. Predatory journals list scholars who never agreed to serve, and sometimes people who are dead.
Also look for what is missing: no institutional affiliations, no contact addresses beyond a Gmail account, no named editor-in-chief. A legitimate journal is transparent about who is responsible for it, because that responsibility is the product.
Check the turnaround promise
"Peer review completed within 72 hours." "Publication within one week of acceptance."
Real peer review requires finding two or three qualified reviewers, who then read a manuscript in the time their own work allows. Four to twelve weeks to a first decision is normal. Anything dramatically faster is describing a process that does not include review.
Check when the fee appears
Legitimate open-access journals disclose article-processing charges openly, before submission, on a page you can find without asking. The charge is a business model, not a secret.
Predatory journals disclose the fee after acceptance — a moment engineered so that withdrawing feels like losing something you have already won. If you cannot find the fee policy before submitting, that is the answer.
Two further signals
Absurdly broad scope. A journal covering "engineering, medicine, humanities and social sciences" has no coherent reviewer pool, because no such pool exists.
Solicitation by flattery. Unsolicited email praising a paper of yours and inviting a submission — often in a field adjacent to but not actually yours — is a mail-merge, not a compliment.
If you have already submitted
Withdraw in writing, immediately, and keep the correspondence. Some journals will claim a withdrawal fee; you generally owe nothing if no review has occurred and you have not signed a transfer of copyright.
If it has already been published, talk to your supervisor or research office before doing anything else. The paper cannot simply be resubmitted elsewhere — it exists — and the route forward depends on your institution’s policy and the journal’s actual copyright position. It is recoverable more often than people assume, but not by ignoring it.
We do this work every week — for MPhil and PhD candidates, faculty, and whole departments.
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