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Supporting Documents

You need to include personal details about yourself and your family in your online application to confirm that you’re entitled to Irish citizenship.

All the information you need can be found on the supporting documentation that you’ll have to submit with your application form.

Once you begin your online application, you have to complete it fully. You can’t save your details and finish it later. So make sure you have these documents to hand before you start:

You will need:

Your details

  • Your birth certificate
  • Marriage certificate
  • Deed poll (if you’ve changed your name)

Your parent’s details (through whom you’re claiming citizenship)

  • Birth certificate
  • Marriage certificate
  • Deed poll (if they changed their name)
  • Declaration of Alienage (if they ever renounced their Irish citizenship)

You may also need:

Depending on the circumstances under which you’re claiming Irish citizenship, you may also need:

Your Irish-born grandparent’s details

  • Birth certificate
  • Marriage certificate
  • Deed poll (if they changed their name)
  • Declaration of Alienage (if they ever renounced their Irish citizenship)

Your parent’s Naturalisation Certificate

  • Date of their naturalisation
  • Number of their naturalisation certificate

Your parent’s Foreign Births Registration Certificate

  • Date on which their birth was registered on the Foreign Births Register
  • Office from which their registration was issued
  • Foreign Births Entry Number (found on the certificate)

Your parent’s Post-Nuptial Declaration

  • Date on which their Post Nuptial Declaration was granted
  • Number of their Post Nuptial Declaration Certificate 

Your parent’s adoption details

  • Date of their adoption

Further documentation

We may ask you to submit more documents to support your application. If you’re applying to one of our Embassies or Consulates overseas, check their website for details of any other documents they might need.


We may check the authenticity of all documentation you submit as part of your application.

Getting replacement documents

We need original documents (not photocopies) to process your application. If you don’t have the original certificates, you can get replacements from the General Registrar's Office.  


When you submit and print your online application form, a checklist of the documents you need will also print out. Please ensure that you have included all the documents on the checklist with your application.


If you haven’t signed your application form or included all the necessary documents, your application will be returned to you.

Where to Send your documentation

Applications to the Irish Embassy in Buenos Aires can be sent by post (registered) or by courier. Alternatively, you, or someone representing you, can come in person to the Embassy with the documents. Embassy opening hours