IEEE confirmed: 157 Conferences with the Proceedings inserted in IEEE Xplore were fake.
IEEE confirmed that 157 Conferences with the Proceedings already inserted and recorded in IEEE Xplore were ... fake conferences. See the confession in the IEEE Site:
http://www.ieee.org/conferences_events/conferences/publishing/author_form.html
Some sources report that the IEEE conferences with fake papers are more (>1100) as nobody can guarantee their quality. Google: ACM fake or ACM bogus or ACM junk.
LIST WITH THE LARGEST FAKE IEEE CONFERENCES