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Complete guide to claiming American citizenship through your ancestors — eligibility, documents, timeline, costs, and how to file. Reviewed by Ancestra's north america counsel.
Quick Facts
Eligibility
United States citizenship by descent is governed by INA §§301 & 309 · acquisition at birth. U.S. citizenship may pass at birth to a child born abroad to a U.S. citizen parent when the relationship and the parent's statutory U.S. physical-presence requirement are established. We assess the law in effect at birth, assemble the evidence, and coordinate passport, CRBA, or certificate-of-citizenship applications.
Eligibility for United States citizenship by descent depends on three key factors: (1) the generational distance between you and your American ancestor — most American programs cover up to parent (2nd generation), but some go further; (2) whether the citizenship line was broken by naturalization in another country before the next child's birth in the line; and (3) the specific statute in effect at the time of each birth in the line.
Ancestra's written eligibility opinion addresses all three factors for your specific case, citing the exact statute and consular venue that applies. Our genealogists specialize in recovering the civil registry, parish, and consular records required to establish the unbroken lineage that American nationality law requires.
Key constraints & rules
The #1 thing to know
The applicable law is the law in effect when the child was born. Establishing each parent's citizenship, the parent-child relationship, and qualifying physical presence is essential.
Generational limit
No fixed generation limit, but each generation must independently have acquired citizenship and meet the transmission law in force at the child's birth.
Transmission rule
A child born abroad may acquire citizenship at birth through a U.S. citizen parent or parents under INA §§301 and 309; requirements vary by the parents' status, marital circumstances, and the law in force at birth.
Dual citizenship
Generally permitted — U.S. law does not require a citizen to choose between U.S. citizenship and another nationality.
Language requirement
None for citizenship acquired at birth.
Residency requirement
For many one-U.S.-citizen-parent cases born on or after November 14, 1986, the U.S. citizen parent must have been physically present in the U.S. for 5 years before birth, including 2 years after age 14; historical rules vary.
Filing authority
U.S. Department of State (passport or Consular Report of Birth Abroad) or USCIS (Certificate of Citizenship).
Key statute
Immigration and Nationality Act §§301 and 309 (8 U.S.C. §§1401, 1409)
Special paths available
A qualifying child under 18 may also acquire citizenship after birth under INA §320; certain children residing abroad may pursue a certificate under INA §322.
The 5-step process
Discovery & eligibility memo — Ancestra conducts a private 90-minute consultation, reviews what you know about your American ancestry, and delivers a written eligibility opinion citing the specific statute that applies to your case.
Genealogy & document recovery — Our network of genealogists retrieves the American records from the relevant civil registry and parish archives, plus the destination-country naturalization (or no-record) documentation.
Advisory & strategy — With documents in hand, we re-confirm eligibility, identify any discrepancies (name variants, date conflicts), and choose the fastest filing venue for your United States case.
Dossier compilation — Our paralegals compile the application binder in the exact format the American consulate or ministry requires, with translations, apostilles, and cross-reference indexes.
Submission & representation — We book the consular appointment or file with the ministry, attend with you (or by power of attorney), draft every RFE response, and stay with you through the oath ceremony and passport issuance.
Documents you'll need
Below is the standard checklist for an United States citizenship by descent filing. Ancestra retrieves most of these on your behalf — you typically only need to provide what you already have (your own birth certificate, your parents', and any old family documents you've inherited).
United States FAQ
How do I qualify for United States citizenship by descent?
You qualify for United States citizenship by descent if you have a American ancestor (typically up to parent (2nd generation)) and the citizenship line was never broken by naturalization in another country before the next child's birth. U.
How long does the United States citizenship by descent process take?
The United States citizenship by descent process typically takes 3–12 months, depending on the filing venue (consular, judicial, or administrative) and the completeness of your dossier. Ancestra quotes a specific timeline forecast in your eligibility memo based on the consulate or court that will handle your case.
What documents do I need for United States citizenship by descent?
You'll need: certified long-form birth certificates for each person in the line, marriage certificates (and divorce/death where applicable), the American ancestor's birth certificate (retrieved from the civil registry or parish of their commune of origin), naturalization records (or a "no record" letter), apostilles on all foreign documents, and certified sworn translations. Ancestra retrieves most of these documents on your behalf.
How much does United States citizenship by descent cost?
United States citizenship by descent costs $3,000 – $12,000 (all-in, fixed fee), all-in on a fixed fee basis. This typically includes document retrieval, apostilles, translations, dossier compilation, consular filing, and counsel representation through the oath. Ancestra quotes a specific fixed fee in writing after consultation — no hourly billing, no add-ons.
Can I keep my current citizenship if I claim American citizenship?
United States permitted dual citizenship. You can hold both your current citizenship and your United Statesn citizenship simultaneously — no renunciation required.
Do I need to travel to United States to file?
Usually not. Most United States citizenship by descent filings are handled at the American consulate in your country of residence. In-person attendance at the oath ceremony may be required, but counsel can often attend by proxy.
Cost & Timeline
Ancestra quotes a fixed fee in writing after your consultation. No hourly billing, no add-on charges for translations, apostilles, or routine RFE responses. Below is the typical range for United States cases:
All-in cost
$3,000 – $12,000 (all-in, fixed fee)
Timeline
3–12 months
Other north america programs
Run our free 4-minute eligibility check, or book a private consultation with a case lead who specializes in United States citizenship by descent. You'll get a written eligibility opinion within 48 hours, citing the specific statute that applies to your case — no commitment, no retainer.