An airline apologized for accusing a man of disrupting a flight he wasn't even on — and snitching to his boss

• Ryanair said it "mistakenly identified" a man as disrupting a flight he wasn't on.
• The airline reportedly wrote to Eoin Michael Cahill's boss and put him on a no-fly list.

Ryanair has apologized in court to a man it accused of misbehaving on a flight he never boarded, according to Irish newspaper The Journal.

The ultra-low-cost carrier not only put Eoin Michael Cahill on a no-fly list, but also wrote to his employer to complain about him, the outlet reported.

Cahill was reportedly booked on the flight from Dublin to Copenhagen on January 2, but ended up staying in Ireland after he extended his leave from work, per The Journal.

The court heard that the following day, Cahill's boss received an email from Ryanair saying he had been "disruptive" on the flight, The Journal reported.

The incident involved a passenger who got into an altercation with Ryanair staff, which required the help of airport police.

When Cahill first complained to the airline, Ryanair stood behind its decision to blacklist him before then asking for more time to investigate, per the Irish Independent.

Cahill then took the issue to the Irish High Court, accusing Ryanair of defamation.

The Journal reported he said the allegation could have disastrous effects on his reputation, especially because he has to travel to Denmark as part of his job.

The judge was informed Tuesday that Ryanair wished to "sincerely and unreservedly" apologize to Cahill, per The Journal.

It added Ryanair admitted Cahill had been "mistakenly identified," and offered to pay his legal costs plus compensation of 10,000 euros ($10,700). The case was closed on Tuesday, according to court records.

The airline also said it would write a letter to Cahill's employers, saying its accusations were "fully withdrawn," per The Journal.

Ryanair did not immediately respond to a request for comment from Business Insider.