MidAmeriCon II, the 2016 Worldcon, has issued a statement through their Facebook Page and Twitter feed addressing concerns about the confirmation emails sent to members casting their 2016 Hugo Award nominating ballots electronically:

In the final days of the Hugo Nomination Period, the high volume of nominating traffic led to a problem with our nomination email receipts. We sincerely apologize for the confusion and concern that this has caused. This error only affects the email system and not the nomination ballots. While a few members may still receive emails from our system, we have identified what caused this problem and have taken the appropriate steps to prevent this from happening during Hugo voting.

The 2016 Hugo Awards are administered by the 2016 World Science Fiction Convention. Address questions about the administration of the 2016 Hugo Awards to the current Worldcon’s Hugo Award Administrators.