My Department has recently launched a new webpage to help people better understand the naturalisation application process, including the key documents required for identity and residency. The page also provides guidance on how to have documents certified and can be viewed here: www.irishimmigration.ie/how-to-become-an-irish-citizen-guide/
All applicants should take care to submit all the required and correct supporting documentation with their application. Where my Department identifies an incomplete application, they will afford the applicant 28 days to provide the missing documents. When the application is returned, a communication is provided outlining what was missing or incorrect.
The application cited from the Deputy was deemed ineligible as they failed to provided a correctly certified copy of their passport, originally and on their resubmission.
Although there is no appeal option provided for under the provisions of the Irish Nationality and Citizenship Act 1956, it is open to anyone to make a new application at any time. There is no time limit within which you can make a new application, nor is there any maximum limit on the number of applications. Applicants are advised that in making any new application they should bear in mind the reasons why the previous application was deemed ineligible.