Sydney's Luna Park ordered a conservative political network to stop advertising tickets to a conference at its iconic amusement park it claims the group never had a booking for.
CPAC Australia, due to be held on October 1 and 2, has been billed as the country's "largest and most influential gathering of conservatives" and includes a line-up of high-profile speakers.
Brexit mastermind Nigel Farage, one of Donald Trump's former chiefs-of-staff, and former prime minister Tony Abbott are among those set to attend.
A Facebook page bearing the group's name has been spruiking tickets for the upcoming conference at "family friendly Luna Park", some of which cost up to $7,000.
However, a spokesman for the venue said it wasn't hosting the event.
"Luna Park also confirms it has never had a signed agreement or booking in place with CPAC to host this event, despite claims to the contrary," the spokesman said.
"We have contacted CPAC seeking the removal of all Luna Park Sydney branding and material from their website and social media channels."
This afternoon, several social media posts published as recently as August 19 advertising Luna Park as the venue remained online.
CPAC, which stands for Conservative Political Action Conference, was contacted for comment.
Just before 2pm today, it sent out an email to followers saying it had secured a venue in "Sydney's CBD" — but it did not say where.
The email took aim at "left wing cancel culture" and claimed opponents were attempting to block the event from going ahead.
"The left wing cancel culture crowd want to stop us from holding a middle Australia talkfest focused on the things that matter to you and your family," it read.
"They will do everything to shut us down including harassing and threatening any venue willing to host us.
"We therefore will protect the venue from the irrational mob by not releasing the specific location until closer to the date. Thank you for your understanding."
CPAC's website includes pages where people can register for tickets to the conference, which range from $49 for a single-day student pass to $7,000 for a "platinum experience".
Tickets for CPAC's Sir Robert Menzies Gala Dinner, set for October 1, have sold out at a cost of $249 each, according to the website.
The website claims Mr Farage will be joined at the conference by President Trump's former chief-of-staff Mick Mulvaney and one-time acting US attorney-general Matthew Whitaker.
Several past and present Australian politicians are on the billing, according to the website, including Warren Mundine, Coalition senators Jacinta Price and Matt Canavan, and former Warringah candidate Katherine Deves.
The website also said a "former prime minister of Australia" was yet to be announced on the line-up.
Mr Abbott was confirmed as the mystery guest in the email CPAC Australia sent out on Friday afternoon.