How to protect the credibility of articles published in predatory journals

Predatory journals often prey on innocent researchers who are unaware of the threat they pose. This paper discusses what researchers can do if they unintentionally publish a paper in a predatory journal, including measures to take before submission, during peer review, and after the journal has accepted a manuscript. The specific recommendations discussed are pre-registration, pre-submission peer-review, open peer-review, topping up reviewers, post-publication peer review, open recommendation, and treatment as unrefereed. These measures may help to ensure the credibility of the article, even if it is published in a predatory journal. The present article suggests that an open and multi-layered assessment of research content enhances the credibility of all research articles, even those published in non-predatory journals. If applied consistently by researchers in various fields, the suggested measures may enhance reproducibility and promote the advancement of science.