Form DS-4079, the Request for Determination of Possible Loss of United States Citizenship, is the questionnaire the U.S. Department of State uses to decide whether you kept or lost your U.S. citizenship after doing something that might have expatriated you. You fill it out at a U.S. embassy or consulate, sign it under oath, and a consular officer uses your answers, plus the standards in 7 FAM 1200, to recommend either a Certificate of Loss of Nationality (CLN) or a finding that you remain a U.S. citizen.
The problem this form solves is brutal: under 8 U.S.C. §1481(a), seven categories of acts can strip your citizenship, and the consequences include losing your U.S. passport, losing the right to vote, triggering the IRS exit tax under IRC §877A, and being barred from re-entering the country freely. Roughly 5,315 Americans formally expatriated in just one quarter of 2020, according to the Treasury Department’s quarterly publication, so this is not a fringe issue.
Here is what you will learn in this guide:
- 📝 How to complete every line of DS-4079, from biographical questions to the seven potentially expatriating acts.
- ⚖️ How the Vance v. Terrazas intent standard and the 1990 administrative presumption shape your answers.
- 🌍 How DS-4079 interacts with DS-4080, DS-4081, DS-4082, and DS-4083.
- 💰 How IRS Form 8854 and the $2,350 renunciation fee fit into the bigger expatriation picture.
- 🚫 The most common mistakes that cost people their citizenship by accident, and how to avoid each one.
What DS-4079 Actually Is
DS-4079 is a sworn questionnaire, not a renunciation form. It exists because the Immigration and Nationality Act lists specific acts that can end U.S. citizenship, but the Supreme Court in Afroyim v. Rusk and Vance v. Terrazas held that the government must prove you intended to give up citizenship. The form gathers the facts a consular officer needs to apply that intent test.
The State Department uses your answers to determine whether you committed an expatriating act with the specific intent to relinquish nationality, the standard codified in 7 FAM 1211. If the officer finds intent, the case goes to the Department of State’s Bureau of Consular Affairs for a CLN. If the officer finds no intent, you keep your citizenship and the file closes.
A common misconception is that doing a listed act, like taking a foreign oath, automatically ends citizenship. That was true before 1990, but the State Department’s administrative presumption of retention presumes you intended to keep citizenship for most routine acts. The consequence of misreading this rule is that people either panic and renounce when they did not need to, or they assume they are safe when they actually performed a high-risk act like serving as a foreign head of state.
For example, Maria, a U.S.–Italian dual citizen, took a teaching job at a public school in Rome. She feared she had lost her citizenship. Because routine foreign government employment is presumed retentive under the 1990 policy, her DS-4079 answers should clearly state she never intended to give up U.S. nationality, and the officer will almost certainly find she remains American.
Where the form lives in the broader process
DS-4079 is paired with several other forms depending on whether you want to keep or lose citizenship. If you are voluntarily renouncing, you will also sign DS-4080 (Oath of Renunciation) and DS-4081 (Statement of Understanding of Consequences). If you are claiming a past relinquishment, DS-4079 may be the only questionnaire, but the consular officer still issues DS-4083, the Certificate of Loss of Nationality, if loss is approved.
The plain-English version is this: DS-4079 collects the facts, DS-4081 makes sure you understand what you are giving up, DS-4080 is the actual oath, and DS-4083 is the official certificate. The consequence of skipping any step in a renunciation is that the State Department can refuse to issue the CLN, leaving you still a U.S. citizen with full tax and reporting duties.
A real example: David, a U.S.–Canadian banker, signed DS-4080 but refused to sign DS-4081 because he disagreed with the tax warnings. The consular officer suspended his case under 7 FAM 1262, and David remained a U.S. citizen for two more tax years until he completed the paperwork. The misconception he held was that the oath alone was enough; in practice, the entire packet must be complete.
Before You Touch the Form
You cannot file DS-4079 by mail. The State Department requires an in-person interview at a U.S. embassy or consulate abroad, and the form must be signed in front of a consular officer. The consequence of trying to mail it in is automatic rejection and the loss of your appointment slot, which at busy posts like London or Toronto can mean a six-month delay.
You should gather every document that proves your identity, your U.S. citizenship, your foreign citizenship if any, and the dates of any potentially expatriating act. The list usually includes your U.S. passport, your foreign passport, your birth certificate, your naturalization certificate if applicable, your foreign naturalization certificate, marriage certificates, and any military service or government employment records. Missing documents force the officer to continue the case, which delays the CLN by months.
The current fee for renunciation is $2,350, set by the Schedule of Fees for Consular Services. There is no fee to file DS-4079 if you are claiming a past relinquishment without a current renunciation, but most posts still require the same appointment system. A common misconception is that the fee is refundable; it is not, even if your CLN is denied.
For example, Hiroshi, a U.S.–Japanese dual national, paid the $2,350 fee, then changed his mind during the interview. He kept his U.S. citizenship but lost the entire fee. The lesson is that you should be certain before you book the appointment, because the State Department treats the fee as payment for processing, not for the outcome.
Walking Through DS-4079 Line by Line
The form runs roughly five pages and is divided into biographical questions, U.S. citizenship history, foreign citizenship history, the seven potentially expatriating acts, residential and family ties, and a final affirmation. Every question matters because the officer is building an intent picture, and one careless answer can flip the result.
Part I: Personal information
The first section asks for your full legal name, any other names used, date and place of birth, and current foreign address. Use the exact name on your U.S. passport, because mismatches trigger identity verification delays under 7 FAM 1300. If you have changed your name through marriage or court order, list every prior version, because failure to disclose a prior name can be treated as a material misstatement.
The form also asks for your Social Security Number. Provide it even if you have not used it in decades, because the IRS cross-references DS-4079 data with Form 8854 to enforce the exit tax. The consequence of leaving the SSN blank is an automatic referral to IRS Criminal Investigation if you later file Form 8854 with a different identifier.
For example, Anna, born in Boston but raised in Germany since age three, never used her SSN. She wrote “unknown” on DS-4079. Her CLN was held for nine months while the consulate verified her identity through the Social Security Administration’s international office. She should have requested her SSN from SSA before the appointment.
Part II: U.S. citizenship history
This section asks how you acquired U.S. citizenship, whether by birth in the United States, birth abroad to U.S. citizen parents under INA §301, or naturalization. Attach the supporting document for whichever path applies, because the officer must verify you ever had U.S. citizenship before deciding whether you lost it.
If you acquired citizenship by birth abroad, the officer checks the physical-presence rules in effect when you were born. The consequence of misstating a parent’s residency is that the officer may decide you never had citizenship to lose, which sounds like good news but actually voids any U.S. passport you have used to enter the country and can trigger INA §212(a)(6)(C) misrepresentation findings.
A common misconception is that a Consular Report of Birth Abroad (CRBA) is itself the source of citizenship. It is only evidence; the underlying statute is what grants citizenship. For example, Liam, born in Ireland in 1985 to a U.S. citizen mother, listed his CRBA but not his mother’s residency dates. The officer almost denied his case until Liam produced his mother’s old college transcripts proving she met the physical-presence requirement.
Part III: Foreign citizenship history
You list every foreign nationality you hold, the date and method of acquisition, and whether you took an oath. The officer uses this to identify whether INA §349(a)(1) (obtaining naturalization in a foreign state) is in play. The plain-English explanation is that becoming a citizen of another country is a potentially expatriating act if done with intent to relinquish.
The consequence of obtaining foreign citizenship voluntarily, after age 18, with intent to give up U.S. citizenship is loss under §349(a)(1). The administrative presumption protects you only if the act is “routine”; affirmatively telling a consular officer you meant to relinquish, or signing a foreign oath that explicitly renounces all prior allegiances, can rebut the presumption.
For example, Yasmin, a U.S. citizen who naturalized in Saudi Arabia and signed an oath disclaiming “any other nationality,” answered DS-4079 saying she intended to keep U.S. citizenship. The officer applied the presumption and she retained both citizenships. The misconception that “any oath equals loss” is wrong; intent is what matters.
Part IV: The seven potentially expatriating acts
This is the heart of the form. You answer yes or no to each act listed in INA §349(a) and explain the circumstances. The seven acts are foreign naturalization, foreign oath of allegiance, foreign military service, foreign government employment, formal renunciation abroad, formal renunciation in the U.S. during wartime, and treason or armed attack against the United States.
Each yes answer requires a narrative explanation: when, where, why, and whether you intended to relinquish. The consequence of a vague answer is that the officer presumes the worst-case interpretation if your written file later contradicts your testimony. Be specific, attach documents, and align your explanation with your stated intent.
A common misconception is that serving in a foreign military always causes loss. Under 7 FAM 1271, service in a non-hostile foreign military as a non-commissioned member is presumed retentive. But service as a commissioned officer in a country at war with the U.S., or service in a policy-level foreign government post like prime minister, rebuts the presumption.
For example, Sofia, a U.S.–Israeli dual citizen, served two years of mandatory IDF duty as an enlisted soldier. Her DS-4079 answer correctly stated the service was compulsory and she never intended to lose U.S. citizenship. The officer applied the presumption and she kept both passports.
Part V: Residential and family ties
The form asks about your U.S. ties: property, bank accounts, family, voting, taxes, and visits. These ties are circumstantial evidence of intent. The consequence of having strong U.S. ties while claiming a past relinquishment is that the officer may find you never intended to give up citizenship, even if you signed a foreign oath decades ago.
The plain-English rule is that intent is judged by the totality of conduct, per Vance v. Terrazas. Filing U.S. tax returns, voting in U.S. elections, renewing your U.S. passport, or registering children as U.S. citizens are all retentive acts that contradict a claim of past relinquishment.
For example, Carlos, who claimed he relinquished by becoming Mexican in 1995, kept filing U.S. taxes and renewed his passport in 2010. The officer denied his retroactive CLN claim because his post-1995 conduct showed he treated himself as a U.S. citizen. The misconception was that a single act fixes intent forever; in practice, later conduct can negate it.
The affirmation and signature
You sign under penalty of perjury before the consular officer. False statements violate 18 U.S.C. §1001 and can result in up to five years in prison. The consequence of even a small false answer is not just a denied CLN; it is potential criminal referral to the Department of Justice.
The misconception is that DS-4079 is a soft questionnaire. It is not. It is a sworn statement used in federal proceedings, and your answers may appear in tax court, immigration court, or criminal court years later. Read every line twice before signing.
Three Common Scenarios
| Reader Situation | Likely DS-4079 Outcome |
|---|---|
| Dual citizen who took routine foreign government job and wants to keep U.S. citizenship | Officer applies 1990 administrative presumption and finds no loss |
| U.S. citizen who voluntarily naturalizes abroad after age 18 with intent to relinquish | Officer finds loss under INA §349(a)(1) and issues a CLN |
| U.S. citizen who served as a commissioned officer in a foreign military hostile to the U.S. | Officer presumes loss under INA §349(a)(3) and refers case for CLN |
| Document Filed | Effect on Your Status |
|---|---|
| DS-4079 only, claiming retention | Continued U.S. citizenship if intent to retain is shown |
| DS-4079 plus DS-4080 and DS-4081 | Voluntary renunciation processed, $2,350 fee charged |
| DS-4079 with inconsistent ties evidence | Case continued, possible denial of CLN |
| Mistake on the Form | Direct Consequence |
|---|---|
| Listing “unknown” for SSN | Months of identity verification delay |
| Failing to disclose a prior name | Possible material-misstatement finding under INA §212 |
| Vague answer to potentially expatriating act question | Officer presumes worst-case interpretation |
Three Named Examples
Priya, a U.S.–Indian dual citizen, married an Indian diplomat and took a routine consular staff job in Delhi. She filed DS-4079 stating she intended to retain U.S. citizenship. Because 7 FAM 1252 treats most foreign government employment as retentive, the officer kept her American.
Marcus, a U.S. citizen who naturalized in Switzerland and signed an oath renouncing all other allegiances, told the officer at the U.S. Embassy in Bern he meant to relinquish. The officer issued a CLN under INA §349(a)(2) and Marcus also filed Form 8854 with the IRS to handle the exit tax.
Aiko, born in California to Japanese parents and raised in Tokyo, was an “accidental American” who learned at age 35 she still owed U.S. taxes. She used DS-4079 plus DS-4080 to formally renounce, paid the $2,350 fee, and used the Streamlined Filing Compliance Procedures to clean up six years of back taxes before her CLN was approved.
Mistakes to Avoid
- Listing your SSN as “unknown” when it can be retrieved from SSA’s international office, because this triggers months of verification delay.
- Failing to disclose a former married name, because the State Department treats omissions as material misstatements under INA §212(a)(6)(C).
- Giving vague answers about foreign oaths, because the consular officer presumes the most expatriating interpretation when your answer is unclear.
- Claiming you relinquished decades ago while still filing U.S. tax returns, because later retentive conduct rebuts your claim under Vance v. Terrazas.
- Skipping DS-4081 in a renunciation case, because the State Department will not issue a CLN without proof you understood the consequences.
- Forgetting to file Form 8854 with the IRS, because expatriation without 8854 keeps you on the hook for U.S. tax filings indefinitely.
- Signing DS-4080 while still a minor, because 7 FAM 1292 requires that renunciation be the act of an adult with full legal capacity.
- Renouncing while mentally incapacitated or under duress, because such renunciations are voidable and the CLN can later be revoked.
- Assuming the $2,350 fee is refundable, because the Schedule of Fees treats it as a processing fee regardless of outcome.
- Lying about U.S. ties to speed the case, because false statements violate 18 U.S.C. §1001 and can result in criminal prosecution.
Do’s and Don’ts
Do’s
- Do bring every original document, because consular officers cannot accept uncertified copies for citizenship determinations.
- Do read 7 FAM 1200 before your appointment, because it tells you exactly how the officer will weigh your answers.
- Do consult a tax attorney about IRC §877A before renouncing, because the exit tax can apply to unrealized gains.
- Do keep copies of every form you sign, because the State Department’s record retention is not always reliable across decades.
- Do answer every question, even those that seem irrelevant, because blanks are treated as refusals to answer and can void the form.
Don’ts
- Don’t try to mail DS-4079, because in-person sworn testimony is required under 22 CFR 50.40.
- Don’t renounce on the same day you first walk into the embassy, because most posts require a two-appointment process to ensure the decision is considered.
- Don’t omit a foreign citizenship you no longer use, because nondisclosure can be treated as fraud and used to revoke a CLN later.
- Don’t assume dual citizenship is automatically lost, because the State Department’s dual nationality guidance generally permits it.
- Don’t rely on internet forums for legal advice, because the rules change and a wrong answer on DS-4079 cannot be unsigned.
Pros and Cons of Filing DS-4079
Pros
- The form gives you a definitive answer about your citizenship status, ending years of uncertainty.
- It triggers a formal record at the Department of State, useful for future passport, tax, or estate matters.
- It allows accidental Americans to clean up status and stop accruing U.S. tax obligations under FATCA.
- It clarifies whether routine foreign acts cost you citizenship, often confirming retention under the 1990 presumption.
- It produces a CLN that foreign banks accept under FATCA reporting, simplifying your foreign banking relationships.
Cons
- The renunciation fee is $2,350 and is non-refundable, even if your CLN is denied.
- The exit tax under IRC §877A can be devastating for high-net-worth filers.
- A CLN is generally irrevocable, so a moment of frustration can permanently end your U.S. citizenship.
- Future U.S. visits require visas, and the Reed Amendment can bar entry for tax-motivated renouncers.
- The process can take six to twelve months at busy posts, during which your status remains uncertain.
Court Rulings That Shape DS-4079
The Supreme Court in Afroyim v. Rusk held that Congress cannot strip citizenship without the citizen’s assent, which is why DS-4079 focuses so heavily on intent. The plain-English version is that the government must prove you meant to lose citizenship, not just that you did something on the §349(a) list.
Vance v. Terrazas refined the rule by holding that intent can be proven by a preponderance of the evidence and inferred from conduct. The consequence is that the officer can use your tax filings, voting record, and U.S. visits as evidence of retentive intent, even if you signed a foreign oath.
Kawakita v. United States established that dual nationals owe allegiance to both countries and cannot use one nationality as a shield against the other. The misconception is that dual nationals are partially American; in fact, they are fully American until a CLN issues, with all the duties and penalties that come with citizenship.
How DS-4079 Connects to the IRS
Filing DS-4079 is only half the expatriation puzzle. The IRS requires Form 8854 to certify five years of tax compliance and to compute any exit tax under IRC §877A. The plain-English rule is that you cannot truly walk away from the U.S. tax system without filing 8854.
The consequence of skipping 8854 is being treated as a “covered expatriate,” which subjects worldwide assets to a deemed sale at fair market value on the day before expatriation. For 2026, the §877A exclusion amount is indexed annually, and exceeding the net-worth threshold of $2 million also triggers covered status.
For example, Elena renounced and got her CLN but never filed 8854. The IRS later assessed exit tax plus penalties on her global portfolio. Her misconception was that the State Department and the IRS share a single file; they do not, and you must independently satisfy both.
Key Entities You Will Encounter
The Bureau of Consular Affairs is the State Department arm that processes DS-4079. The Office of Legal Affairs in CA/OCS/L reviews every CLN before it issues. The IRS Large Business and International Division handles expatriation tax cases.
The Department of Homeland Security maintains records of your U.S. entries, which the consular officer may pull to evaluate retentive ties. The Social Security Administration’s international operations retrieves SSNs and verifies earnings histories. Each entity plays a role, and the consequence of ignoring any one of them is delay or denial.
FAQs
Is DS-4079 the same as a renunciation form?
No. DS-4079 is a questionnaire used to determine possible loss of citizenship. Renunciation also requires DS-4080 (Oath) and DS-4081 (Statement of Understanding) signed before a consular officer.
Can I file DS-4079 by mail?
No. 22 CFR 50.40 requires the form to be signed in person before a U.S. consular officer at an embassy or consulate abroad.
Does taking foreign citizenship automatically end U.S. citizenship?
No. Since 1990, the State Department presumes you intended to keep U.S. citizenship unless you affirmatively show otherwise on DS-4079 or in your foreign oath.
Will I owe U.S. tax after filing DS-4079?
Yes. Until the CLN is approved and Form 8854 is filed, you remain a U.S. taxpayer. Even after, the exit tax under IRC §877A may apply to covered expatriates.
Is the $2,350 renunciation fee refundable?
No. The fee is set by the Schedule of Fees for Consular Services and is treated as a processing fee, payable regardless of whether your CLN is approved or denied.
Can children file DS-4079 to renounce?
No. Minors generally cannot renounce, because 7 FAM 1292 requires the legal capacity of an adult to form expatriating intent.
Can I undo a CLN after it issues?
No. A Certificate of Loss of Nationality is generally final. Reversal requires proof of duress, incapacity, or material error, and is rarely granted by the Bureau of Consular Affairs.
Do I need a lawyer to file DS-4079?
No. A lawyer is not required, but tax counsel is strongly advised because of the IRC §877A exit tax and the irreversibility of expatriation decisions.
Will the U.S. let me visit after expatriation?
Yes. Former citizens can apply for B-1/B-2 visas or use the Visa Waiver Program if eligible, though the Reed Amendment can bar tax-motivated renouncers.
Does serving in a foreign military end U.S. citizenship?
No. Routine, non-policy-level service in a friendly foreign military is presumed retentive under 7 FAM 1271, unless intent to relinquish is shown.
Is DS-4079 used for past relinquishments?
Yes. You can file DS-4079 to document a past expatriating act and request a back-dated CLN, though later retentive conduct can defeat the claim.
Does filing DS-4079 affect my children’s citizenship?
No. Your renunciation does not strip a child’s separately acquired U.S. citizenship; each person’s status is determined individually under the INA.
Related reading
- How to Fill Out USCIS Form I-193 (w/Examples) + FAQs
- How to Fill Out USCIS Form N-644 (w/Examples) + FAQs
- How to Fill Out IRS Form 8854 (w/Examples) + FAQs
- How to Fill Out Dept of State Form DS-4080 (w/Examples) + FAQs
- How to Fill Out Dept of State Form DS-4081 (w/Examples) + FAQs
- How to Fill Out Dept of State Form DS-4083 (w/Examples) + FAQs
- How to Fill Out USCIS Form I-821 (w/Examples) + FAQs