Please note that Ireland is not part of the Schengen region.

Based on your nationality, you might required a Visa to enter Ireland. Please refer to below information.

https://www.irishimmigration.ie/coming-to-work-in-ireland/what-are-my-options-for-working-in-ireland/coming-to-work-for-less-than-90-days/conference-event-visa/

We are happy to provide confirmation letters for registered attendants. Please get in touch with the organisers: contact@dep2024.com. It seems that original letters (digital signatures and photocopies will not be accepted) are required. Plan sufficient time for the letter to reach to your address from Ireland.