Fans may be refused entry or fined if they buy unauthorised tickets for the band’s upcoming Brisbane concerts.

Suncorp Stadium general manager Alan Graham said the venue was aware of people paying “excessively inflated prices” for tickets to the December shows.

Tickets purchased through unofficial outlets such as Red Circle, www.worldticketshop.com and www.ticketfinders.com.au could be cancelled, he said.

Ticket scalpers and their customers can risk fines of up to $2000.

“If people do deal with these unscrupulous operators there is a possibility that they may never receive tickets and there is no guarantees if they do that the tickets purchased will be valid entry into the venue,” Mr Graham said.

“The promoter is quite within their rights, if they believe scalping has been involved, to cancel the barcodes if they know which tickets are involved in any scalping.”

Mr Graham said fans should purchase their tickets through official venue Ticketek to avoid disappointment.

“[Offending] sites are offering prices way over the face value and we know from the Andre Rieu concert a couple of years that people purchased tickets through these outlets and the tickets never arrived,” he said.

U2’s Wednesday December 8 show rapidly sold out last Friday, prompting the announcement of a second show for December 9.