The phrase "attendees confirmed" is correct and usable in written English.
It can be used in contexts such as event planning or meeting organization to indicate that participants have acknowledged their attendance.
Example: "The final count for the conference is 150, as all attendees confirmed their participation by the deadline."
Alternatives: "participants confirmed" or "guests confirmed".
Along with the gathering in D.C., Dorsey also hosted a dinner in New York City with local conservative media leaders, two attendees confirmed.
Two other attendees confirmed people were locked in and passing out.
The layoffs must take the shine off the memories of last night's CBS Holiday Party held on the 35th floor of Black Rock, which ETP attended at the tail end but other attendees confirmed was a well-attended, well-watered and convivial affair.
Support group attendees confirmed that they were told that the pills they were taking "boost their body protecting cells" and if they do not take their pills as directed their "immunity system becomes weak and pills will stop working in their bodies and they will die".
Two other meeting attendees have confirmed this version of events to HuffPost.
And he has been hitting the phones, getting people to show up at rallies or following up with rally attendees to confirm they are still supporting the campaign and see whether they might be interested in volunteering their time as well.
Lunch provided for all confirmed attendees.
Another leading Republican conservative and attempted 2012 nominee, Newt Gingrich, is also among the confirmed attendees.
Confirmed attendees include Eric E. Schmidt of Google, Mark Zuckerberg of Facebook, Jeffrey P. Bezos of Amazon and Rupert Murdoch of News Corp.
Over on Facebook, a tentative Jeremy Corbyn victory party is being planned for the evening of 12 September in Trafalgar Square, London, with more than 300 confirmed attendees so far.
The Facebook event, created by Johnston on Sunday night, had more than 1,100 confirmed attendees by the time the Comcast Center big screen ran the pregame message about treating opponents with respect.
