Ticketmaster will begin issuing refunds later this morning, to people who bought tickets to the Garth Brooks concerts at Croke Park.
The company says all monies will be refunded to credit cards used to make purchases, including the service charges.
Fans can get further information through ticketmaster's website.
Meanwhile, the Chief Executive of Dublin City Council Owen Keegan is expected to appear before the Oireachtas Transport Committee on Friday regarding the controversy.