Citizenship Application Support Service (CASS)

CASS provides information and one to one advice service for individuals and families applying for Irish naturalisation in different languages.

We are open five days a week in Dublin and we provide support for the following: 

  • Citizenship / Naturalisation application process for adults and minors

  • Passport applications

  • Letters

  • General enquiries on citizenship, naturalization, eligibility, immigration status, etc.


Please note, a fee applies for CASS services. You can contact the offices directly for relevant fees. 


For all the latest citizenship Law, Policy and Guidance visit HERE


Address: 44 Lower Gardiner Street, Dublin 1 (the basement) 

Monday - Friday 9.30 am – 4.30 pm

Tel: (01) 535 7238 or (087) 965 4668



CASS is not a government organization, nor is it tied with the immigration office. We do not fill out applications or have any access to them once they are sent. We do not have any knowledge of citizenship status. Please be advised that it takes on average for non-EU/EEA citizens between 12-24 months, and may even take longer, to get a response directly from immigration.

CASS does not accept responsibility for direct, indirect, incidental or consequential loss suffered as a result of availing of our service. We do not give any warranty that this service will be error-free and request that applicants check applications to ensure accuracy before submission.


Page Updated 04 July 2022