Where my Department receives a naturalisation application which is missing key supporting documentation, the application is returned to the applicant with a request to provide the missing documentation within 28 days. A reminder is issued after 18 days if the required documentation has still not been provided. If an applicant fails to provide the requested information, the application is then deemed ineligible and closed.
I can advise the Deputy since October 2023, 4,557 naturalisation applications have been deemed ineligible. The number of applications deemed ineligible should be viewed in the context that during this same period of time my Department received approximately 80,000 applications.
My Department continues to monitor applicant experience and is committed to continuous improvement. Guidance on how to make an application for naturalisation can be viewed here: https://www.irishimmigration.ie/how-to-become-an-irish-citizen-guide/. This guide is kept under constant review.