The Irish Foreign Births Register: a complete guide

What the Foreign Births Register is

The Foreign Births Register records people born outside Ireland who are entitled to Irish citizenship through descent. Your entry on the register is what makes you an Irish citizen. Unlike children of Irish-born parents, who are Irish automatically, grandchildren become citizens only once they are registered, and citizenship runs from the date of registration rather than from birth.

The register in its current form rests on the Irish Nationality and Citizenship Act 1956, which took effect on July 17, 1956. Earlier citizenship legislation from 1935 also provided for registering births abroad.

Who qualifies for the Foreign Births Register

You can apply if you were born outside Ireland, are not already an Irish citizen, and one of the following is true:

• A grandparent was born on the island of Ireland. This is the most common route for American families. Northern Ireland births generally count.
• A parent was an Irish citizen when you were born, but was not born in Ireland. For example, your parent was registered on the FBR, or naturalized, before your birth.

Irish great-grandparents

A great-grandparent alone is not enough. You qualify through a great-grandparent only if your parent was entered on the register before you were born. Because registration is not retroactive, a parent who registers now cannot pass citizenship to children who are already born, though it will pass to children born afterward.

Documents you need

The application is document-heavy. Civil (state-issued) records are expected; church records are generally not a substitute where a civil record exists. Expect to supply originals or certified copies, which are returned once the application is decided.

For you

• Your original full (long-form) civil birth certificate
• Your marriage certificate, or other evidence of any name change
• A certified copy of current government photo ID, such as a passport or driver's license
• Two original proofs of current address
• Four passport-style photographs

For your parent (the link to the Irish grandparent)

• Full civil birth certificate
• Civil marriage certificate, where relevant
• Certified photo ID if living, or a death certificate

For your Irish-born grandparent

• Irish civil birth certificate, issued by the General Register Office
• Civil marriage certificate
• Certified photo ID if living, or a death certificate

Your signature, photographs and ID copy must be witnessed and certified by someone from a listed profession who knows you personally, such as a doctor, lawyer, notary or police officer.

Common document problems

• Name spellings that differ between generations (Irish surnames often shifted after emigration)
• Birth dates that do not match across census, marriage and death records
• Short-form birth certificates that omit parents' names
• Grandparents registered late, or under a different first name or a baptismal name

Small inconsistencies are common and usually manageable, but each one should be explained or supported with additional records before you submit.

How to apply, step by step

1. Confirm the grandparent's Irish birth. Locate the civil birth record before ordering anything else. This is the record everything else depends on.
2. Collect each generation's records from the relevant state vital records offices and the Irish General Register Office.
3. Complete the online application on the Department of Foreign Affairs website and pay the fee.
4. Print, sign and have the form witnessed, along with your photos and ID copy.
5. Post the signed form and documents to the address given on the application.
6. Wait for registration. When you are entered on the register you receive a Foreign Birth Registration certificate. You are then an Irish citizen.
7. Apply for an Irish passport online, using your FBR certificate.

Fees and processing time

Fees and processing times are set by the Department of Foreign Affairs and change from time to time. Check the Department's site before you apply. Karte Global's own fees are listed separately on the fees page.

Frequently asked questions

When did the Foreign Births Register start?

The register in its current form was created by the Irish Nationality and Citizenship Act 1956, which took effect on July 17, 1956. The Irish Nationality and Citizenship Act 1935 had earlier provided for registering births abroad. The Irish-born grandparent's own year of birth does not matter; what counts is birth on the island of Ireland.

How long does the Foreign Births Register take?

As of November 1, 2026, the Department of Foreign Affairs advises allowing approximately 12 months to process a completed application. Gathering the records beforehand often adds several months, and the passport application comes after registration. The Department revises its quoted time from time to time, so check its passport service updates before planning travel.

Who is eligible through an Irish-born grandparent?

Under the Department's criteria, a person born outside Ireland may apply if one of their grandparents was born on the island of Ireland. The grandparent does not need to be living, and the parent who links the generations does not need to have held an Irish passport or applied for anything. The application includes birth, marriage, and identity or death records for the applicant, the connecting parent and the grandparent. Whether a particular family meets the criteria depends on what those records show.

What if I was born before my parent was registered?

Registration is not retroactive. The Department states that children born before a parent was registered are not eligible to apply through that parent. This matters most for great-grandchildren of an Irish-born ancestor: the link works only if the parent was entered on the register before the child was born. Children born after the parent's registration can be registered.

What documents does the Foreign Births Register require?

The Department asks for the applicant's long-form civil birth certificate, any marriage or name-change document, a certified copy of photo ID, two original proofs of address and four photographs, two of them witnessed. For the connecting parent and the Irish-born grandparent it asks for civil birth certificates, marriage certificates where relevant, and certified photo ID or a death certificate. The full list is in the documents section above.

Do I need to be on the register before applying for an Irish passport?

Yes. Registration comes first. The Department states that a person cannot apply for an Irish passport until they are an Irish citizen, and that the Foreign Birth Registration certificate is needed for the passport application. The Department's guideline for a first-time online passport application is 20 working days, plus postage. The certificate shows the name exactly as it appears on the birth certificate, so a passport in a different name needs supporting documents.

Do I have to give up my US citizenship?

No. Ireland permits dual citizenship, and the United States does not require you to renounce US citizenship to hold Irish citizenship.

Can my children apply at the same time?

Children born after your registration can be registered through you. Children born before it cannot use your registration and would need their own route.

My grandparent was born in Northern Ireland. Does that count?

In most cases, yes. Births on the island of Ireland, including Northern Ireland, are generally accepted. Unusual cases should be checked individually.

What if a record cannot be found?

Missing or damaged records are a common reason applications stall. Alternative evidence can sometimes fill the gap, but it should be assembled before you submit rather than after the Department asks for it.