Predatory conferences share many of the characteristics of predatory journals. They charge high registration fees (sometimes exceeding $1000) and they seek to make a profit by delivering a product that does not have rigorous scholarly standards.
OMICS group, BIT Congress, and Conference Series Ltd. have all been accused of taking advantage of scholars by advertising misleading conference offerings (Pai and Franco; Federal Trade Commision). In order to attract a large potential base of scholars, these for-profit conferences may advertise speakers who have not agreed to speak or have unusually broad topics.
When considering conferences, consider the following to determine the reputation and credibility of conferences and their organizers:
You can also look out for the following signs which indicate that a conference is more likely to be predatory: