Predatory journals
Predatory journals exploit the Open Access publishing model. Most open access journals - including high-quality journals - charge the author a fee ("Article Processing Charge" or APC) to support publication and peer-review costs. Predatory journals exist only to collect article processing fees from authors: every article submitted, with payment, is published. There is no legitimate peer review.
If you're being asked to pay an Article Processing Fee/Charge to publish in a journal you're not familiar with, do some research to confirm that it is a legitimate, high-quality open access journal.
Consult the Directory of Open Access Journals (DOAJ) which provides a list of legitimate open access journals. If you still can't find a satisfactory answer, you will need to assess the legitimacy of the journal yourself. Here are some useful resources to guide you:
(UBC's journal assessment page, licensed under a Creative Commons Attribution-ShareAlike 4.0 International License)
Contact the Office of Scholarly Communication if you have questions on any of these areas or have further suggestions for development.
From Thinkchecksubmit.org, licensed under a Creative Commons Attribution License.