Update 1.30pm: People hoping to see Pope Francis in Ireland are being warned to watch out for potential ticket touts.
500,000 places for his mass in the Phoenix Park and a further 45,000 for Knock Shrine will be available for free from next Monday.
People need to log on to WorldMeeting2018.ie and register - however, they will only be allowed attend one of these events.
A massive security operation will be in place - and those attending are being urged to plan their transport and prepare for a long day.
Secretary General of the World Meeting of Families Fr Tim Bartlett says no one should pay for a ticket.
Update 11.50am: Free tickets for Papal visit available from Monday
Tickets for those hoping to see Pope Francis during his Irish visit will be available from next Monday.
Up to 500,000 places are being made available for the Phoenix Park and a further 45,000 for Knock Shrine.
Both events take place on Sunday, August 26 as part of the World Meeting of Families.
People can log on to WorldMeeting2018.ie from Monday morning to register, but people will only be allowed to attend one of the events.
Communications Manager Brenda Drumm says although tickets are free, you will need to get one.
"Tickets for Knock shrine will be printed and posted by July 31 to all of those who have successfully booked on our website," she said.
"We will be issuing the tickets for Phoenix Park as a print-at-home ticket.
"We will not be printing or posting tickets for Phoenix Park. They will also be issued by July 31."
Earlier: Hours-long wait expected for attendees of papal visit in Phoenix Park
People planning to see the Pope in the Phoenix Park could face a two-kilometre walk in and a five-hour wait afterwards.
A traffic exclusion zone will be in place at the venue, with only specially designated vehicles allowed access.
The park will be restricted to visitors for several days beforehand, while strict security vetting will also be in place on the day.
The papal visit on August 25 and 26 will be one of the biggest security operations undertaken in Dublin in the past 30 years.