What a scam! We signed up as a vendor to an October 2020 conference through conferenceseries.com in December 2019 and received no communication for months. Finally, after everything happened with Covid we found out that they had moved the conference that we were going to attend as a vendor to a webinar. We placed at least 10 phone calls and emails to them requesting a refund and have not had one response. They owe us $1599 and apparently have no intention of refunding us ever. I highly recommend staying away from this conference company as a vendor, participant or speaker based on the other reviews.