Recently we have been informed that invited speakers of certain conferences have been targeted by fraudulent emails from “travel services” that asked them to pay (via an online link) for a hotel in the city that the conference is hosted in for the duration of the conference. The scammers took enough time to pick a plausible hotel close to the conference site as the accommodation they were supposed to pay for.
Invited speakers and other conference attendants (who might also receive these kind of emails once the program is made public), please be advised that these kind of things do happen and stay vigilant.