Which documents do I need apostilled for dual citizenship?

Most dual-citizenship applications require an apostilled birth certificate, and often a marriage certificate, naturalization certificate, and FBI background check. The exact set depends on the country and your ancestry line. Italy, Ireland, and Poland ancestry claims lean heavily on birth, marriage, and death records for each linking relative.

Does an apostilled birth certificate expire?

An apostille itself has no federal expiration date. But some consulates reject vital records or apostilles older than three or six months. Check your consulate's rule before you order. If they demand a recent document, request a fresh certified copy, then apostille that copy rather than an old one.

Do I need a translation with my apostille?

Usually yes. Countries like Italy and Poland require a certified or sworn translation of each apostilled document into their language. The apostille is placed on the original English document first, then the translation is prepared. Some consulates require the translation itself be certified or apostilled. Confirm the order with your consulate.

Apostille for Dual Citizenship: Which Documents

You are gathering documents for a second passport. Maybe your great-grandmother was born in Palermo, or your grandfather left County Cork. The application asks for “apostilled” copies of your records. This guide explains which US documents that means, and where each one has to go.

Dual citizenship by descent is a paperwork exercise. The government you are applying to needs proof that your US documents are genuine. An apostille is that proof. It is a certificate attached to your document by a designated authority, confirming the signature and seal are real.

If you want a plain-language definition first, read what is an apostille. This guide assumes you already know you need one.

The core document set

Almost every descent-based citizenship claim rests on vital records. These prove the chain from your immigrant ancestor down to you.

The usual set looks like this:

Your birth certificate
Your marriage certificate, if married
The birth certificate of each ancestor in the qualifying line, where a US record exists
Marriage and death certificates for those ancestors
A naturalization certificate, or proof of non-naturalization, for the ancestor who emigrated
An FBI background check, for some countries

Not every application needs all of these. An Irish Foreign Birth Registration leans on birth and marriage records. An Italian claim through the courts or a consulate wants the full chain, often including death certificates. Confirm your list with the consulate before you spend money.

You can check the correct path for any single document using the pathway checker. It tells you which authority handles that record.

The state versus federal split

Here is the rule that trips people up. Not all US documents go to the same office. Where a document was issued decides who can apostille it.

A state document is apostilled by the state that issued it. That is almost always the Secretary of State’s office. Your California birth certificate goes to California. Your Texas marriage license goes to Texas.

A federal document is apostilled only by the US Department of State Office of Authentications in Washington, DC. No state can touch a federal record.

This matters because two of the documents on your list often sit on opposite sides of that line.

Caption: Where each dual-citizenship document goes (verified July 2026).

Document	Issued by	Apostille authority	Channel
Birth certificate	State vital records	Issuing state’s Secretary of State	State
Marriage certificate	State or county	Issuing state’s Secretary of State	State
Death certificate	State vital records	Issuing state’s Secretary of State	State
Naturalization certificate	USCIS (federal)	US Department of State	Federal
FBI background check	FBI	US Department of State	Federal

The lesson: if your application needs both a birth certificate and an FBI check, you are running two processes at once, in two places, with two different timelines.

Birth, marriage, and death certificates

These are state records. You order a certified copy from the state’s vital records office, then send it to that state’s competent authority.

The certified copy must be the current government-issued version with an original seal or a raised or embossed signature. A photocopy will be rejected. A hospital souvenir certificate is worthless here.

For a California birth certificate, the process and fees live on the California birth certificate page. General California steps are on the California apostille page. New York applicants should read New York apostille, because New York adds a county step for some documents. More on that below.

One warning about older records. If your ancestor’s record predates modern state vital-records systems, it may only exist at the county level. County-issued records sometimes need a county clerk’s certification before the state will apostille them. That is covered in county clerk pre-certification.

The naturalization certificate

If your emigrant ancestor became a US citizen, the country you are applying to often wants the naturalization certificate, or an official statement that no naturalization occurred.

The naturalization certificate is a federal document. It goes to the US Department of State, not to any state office. Do not send it to a Secretary of State. They will return it.

Getting a copy is its own task. You request it from USCIS. That takes time, so start early.

The FBI background check

Several countries want proof you have no criminal record. The standard proof is an FBI Identity History Summary, commonly called the FBI background check.

This is the highest-volume federal document apostilled each year. You obtain it from the FBI directly or through an FBI-approved channeler, then send it to the US Department of State for the apostille. Full detail is on the FBI background check page.

Two facts to plan around. First, a channeler returns results faster than mailing fingerprint cards to the FBI. Second, the federal apostille step itself is slow. Budget five weeks or more by mail. See apostille processing times explained for the full timeline math.

Translation norms by country

An apostille certifies the document. It does not translate it. Most destination countries require a translation of each record into their official language.

The translation standard varies.

Italy requires a translation, and consulates typically want it certified. Some jurisdictions require the translation be done by a sworn translator or itself carry an apostille.
Poland requires a sworn translation, done by a translator on an approved register.
Ireland conducts Foreign Birth Registration in English, so US documents usually need no translation.
Mexico is a Hague member, so US documents get an apostille, and a Mexican official translator handles the Spanish version. See Mexico legalization for the country’s current requirements.

Order matters. The apostille goes on the original English document first. The translation is prepared afterward, referencing the apostilled original. If you translate first and apostille second, you may have to redo the work.

A worked example: Italian citizenship

Say you are claiming Italian citizenship through your great-grandfather, who was born in Italy, emigrated to New Jersey, and naturalized.

Your document list might be:

Your birth certificate (New Jersey, state channel)
Your parent’s birth certificate (New Jersey, state channel)
Your grandparent’s birth certificate (New Jersey, state channel)
Your great-grandfather’s marriage certificate (state channel)
His naturalization certificate (federal channel, US Department of State)

Four documents run through New Jersey’s Secretary of State. New Jersey is mail-only and slow, often 12 to 20 business days, so those four move together on one clock. The naturalization certificate runs on a separate federal clock in Washington. Then every apostilled document needs a certified Italian translation.

Notice that nothing here is fast. Plan for months, not weeks, when a federal document and a slow state share the same application.

A worked example: Irish Foreign Birth Registration

Ireland is simpler. The Foreign Birth Registration wants birth and marriage certificates for the linking relatives, in English, apostilled.

If your Irish grandparent’s descendants were all born in the same state, all your US records run through one state authority. No translation. No federal document unless a naturalization certificate is specifically requested. This is one of the lighter dual-citizenship paths on the document side.

Common mistakes to avoid

Sending a federal document to a state. The naturalization certificate and FBI check never go to a Secretary of State. Confirm the channel with the pathway checker before you mail anything.

Apostilling an old certificate. If your consulate wants a document issued within six months, order a fresh certified copy first. Apostilling a ten-year-old certificate wastes the fee if the consulate rejects the underlying record.

Translating before apostilling. The apostille goes on the original. Translate after.

Underestimating the federal timeline. The state records might come back in two weeks. The FBI apostille can take five weeks or more. Your application is only as fast as its slowest document.

Ignoring the county step. In New York and a few other states, notary-based documents need a county clerk certification first. Vital records skip it, but confirm using county clerk pre-certification.

Budgeting the fees

State apostille fees are small, from $1 in Michigan to $40 in Connecticut. The federal fee is $20 per document. Look up any state’s current fee with the fee lookup tool.

The real cost is rarely the apostille fee. It is the certified copies, the translations, and sometimes an expedite service. Add those up before you start, because a full Italian claim with a dozen apostilled and translated documents adds up quickly.

Ordering the right certified copies

The apostille is only as good as the document under it. States apostille the certified copy, not a photocopy you made at home.

A certified copy comes from the government office that holds the record. For a birth or death certificate, that is the state vital records office. For an older record, it may be the county. The copy carries an original seal, or a raised, embossed, or colored signature that proves it is genuine.

Two rules save you a rejected application. First, order a long-form birth certificate when a country asks for full parental detail. Short-form abstracts often lack the names an ancestry claim needs. Second, order more copies than you think. A single Italian claim can consume several apostilled records, and each is a separate order with its own fee. The definition and limits of a certified copy are covered in certified copies explained.

Poland and Mexico, briefly

Poland is a Hague member, so US documents get an apostille rather than embassy legalization. Poland’s requirement that trips people is translation. Every apostilled record needs a sworn translation by a translator on Poland’s approved register, and consulates are strict about it. Order your apostilles first, then arrange the sworn translations.

Mexico is also a Hague member. Dual-citizenship and family cases usually center on birth and marriage records apostilled at the state level, then translated by an official Mexican translator. See Mexico legalization for the current document rules. Because Mexico takes apostilles, you never need a Mexican consulate legalization stamp on a US record.

The pattern holds across the common ancestry destinations. They are all Hague members, so the country checker will return “apostille” for each. Your variable is translation, not legalization.

Where to go next

Confirm your destination country is a Hague member with the country checker. Every country in the common dual-citizenship set for US applicants is a member, so you will get apostilles rather than embassy legalization. If you are curious how the treaty works, read the Hague Apostille Convention explained.

Then build your document list from the consulate’s own checklist, split it into state and federal piles, and start the federal items first because they are slowest.