Documents You'll Need for Dual Citizenship Applications

Applying for dual citizenship is an exciting milestone — but it comes with a mountain of paperwork. The consulate or embassy of your second country will want to see several of your key records, and nearly all of them must be apostilled before they'll be accepted. Here's what you'll likely need and how to prepare it.

The Documents Almost Every Country Requires

While requirements vary by country, most dual citizenship applications ask for a core set of documents:

1. Birth Certificate (Required)

Your birth certificate is the single most important document in virtually every citizenship-by-descent application. You'll need a certified copy from your birth state's vital records office — not a hospital copy and not a photocopy. Many countries also require a long-form birth certificate showing your parents' names.

2. Marriage and Divorce Records

If you're married, or have ever been married, you'll need certified copies of your marriage certificate and any divorce decrees. These establish your current marital status and, in descent-based citizenship cases, help trace lineage. Each needs its own apostille from the state that issued it.

3. Your Parents' / Grandparents' Records (For Descent-Based Apps)

If you're applying for citizenship through a parent or grandparent, you'll often need their birth certificates, marriage certificates, and naturalization or citizenship documents to prove the lineage. These get apostilled from their respective states, and naturalization certificates (federal) go through the State Department.

4. FBI Background Check

Many countries require a criminal background check as part of the citizenship process. Unlike state documents, your FBI background check must go through the federal apostille path — criminal history records office and the U.S. State Department. See our guide to FBI background check authentication for the full walkthrough.

5. Proof of Identity

You'll typically need a notarized copy of your passport or state ID. A notarization is often required before it will be accepted internationally, and sometimes the notarized copy itself needs an apostille.

6. Name-Change Documents

If any of your documents show a different name than your current one (especially after marriage), you'll need the legal document evidence the change — a marriage certificate, divorce decree, or court-ordered name change — apostilled to connect the records.

How Many Apostilles Will I Need?

Every document, from every state, needs its own apostille. A typical application might involve 4–8 separate apostilles across multiple states. Each state's Secretary of State processes its own, which is one of the reasons using a nationwide service like CieloSky saves you time — we coordinate with every issuing state on your behalf.

Pro Tips for a Smooth Application

• Get certified copies, not photocopies — most consulates and embassies reject anything that isn't an official certified copy.
• Check whether the country is a Hague member — Hague countries accept an apostille; non-Hague countries also need embassy legalization.
• Allow plenty of time — ordering certified copies plus processing apostilles can take several weeks. Start early.
• Keep documents in English — some countries require certified translations. We can prepare notarized translations where needed.

Need Help Pulling It All Together?

Getting all your state and federal documents apostilled — often across multiple states — is exactly what CieloSky does best. We'll identify every document your application needs, collect and certify them, and deliver a complete, ready-to-file package.

Get a free quote: call (973) 641-0574 or give us your details online. Hablamos español.