Passengers are criticizing Aer Lingus as the Irish airline's booking system is unable to recognize a distinct characteristic of many Irish names: fadas.
The issue is reportedly due to the age of the system Aer Lingus uses, Astral, which was developed in the late 60s. Passengers with fadas in their names will not face issues when boarding the plane.
But people with popular Irish names like Áine, Éabha, Róisín, Seán, Oisín, Pádraig, Rían, and Tomás are unable to have their exact names displayed on their boarding passes.
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Aer Lingus acknowledged the issue regarding the issue of people not being able to input fadas into the booking system and told the Irish Mirror that it is "considering implementing reasonable steps" to fix the issue.
"Passengers with special characters on their passport, such as a fada, will be accepted for travel," the airline added.
Many people who have fadas in their names have taken to social media to vent their frustrations, with one person writing: "You have got to be kidding me, Aer Lingus. Absolutely disgraceful that you are still not accepting the fada. Náireach amach is amach."
Another Twitter user named Úna shared their frustrations online, writing: "But Aer Lingus the name on my passport has a fada...!"
Another wrote: "Why am I unable to spell my little boy's name correctly when trying to book a flight? Surely for an Irish Airline, I should be able to use a fada. His name is Rían not Rian."
"The Aer Lingus booking system, Astral, which was developed in the late 60s cannot facilitate the use of special characters as it was built on a platform which does not cater for special characters," an Aer Lingus spokesperson said in a statement.
"We recognize the limitations of the system with respect to accepting special characters and apologize to customers for any inconvenience caused.
"As part of future systems development, we are considering implementing reasonable steps to address this issue."
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