U.S. Citizenship and Immigration Services (USCIS), Department of Homeland Security Edition Edition 01/20/25 (OMB 1615-0087, expires 09/30/2027) 10 pages

Form N-600K — Application for Citizenship and Issuance of Certificate Under Section 322

The USCIS form a U.S. citizen parent, or a citizen grandparent or guardian, files so a child under 18 who lives abroad can become a citizen and get a Certificate of Citizenship.

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Form N-600K · Application for Citizenship and Issuance of Certificate Under Section 322
The official U.S. Citizenship and Immigration Services (USCIS), Department of Homeland Security form, edition Edition 01/20/25 (OMB 1615-0087, expires 09/30/2027) — blank
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What is Form N-600K?

Form N-600K is for children who regularly live outside the United States and didn't become citizens at birth. Under section 322 of the Immigration and Nationality Act, a U.S. citizen parent can apply for the child to be naturalized and issued a Certificate of Citizenship. The child must be under 18, living abroad in the legal and physical custody of the citizen parent, and must be in the United States for the interview and oath. If the citizen parent has died in the last five years, a U.S. citizen grandparent or legal guardian may apply.

The form covers the child's eligibility, the child's details and addresses, any adoption, both parents, the grandparent or guardian if one applies, and the physical presence in the United States of the citizen parent: five years, at least two after age 14. If the parent falls short, the citizen grandparent's physical presence can count instead. You also give a preferred USCIS office and date range for the interview.

FileIt asks each question in plain English, shows only the parts your answers need, and prints everything onto USCIS's own PDF (Edition 01/20/25), with the child's A-Number on every page. It warns you if the interview range runs past the child's 18th birthday. You print the form, sign it in ink and file it yourself; USCIS also accepts it online. FileIt never files anything with USCIS.

Who files
The child's U.S. citizen parent, or a U.S. citizen grandparent or legal guardian if the parent died within the last five years.
For
Children under 18 who regularly reside outside the United States.
Filed
Online with a USCIS account, or by mail to the Phoenix lockbox (from abroad) or the Elgin lockbox (from inside the U.S.). Fee waiver requests go by mail.
Signatures
Signed by hand in ink. FileIt leaves the signature boxes blank.
Edition
Edition 01/20/25 (OMB 1615-0087, expires 09/30/2027)
Agency
U.S. Citizenship and Immigration Services (USCIS), Department of Homeland Security

Who needs to fill out Form N-600K?

  • U.S. citizen parents living abroad whose child wasn't a citizen at birth.
  • Citizen parents who can't pass on citizenship at birth because they lack enough U.S. physical presence, but whose own parent has it.
  • U.S. citizen grandparents or legal guardians of a child whose citizen parent died within the last five years.
  • Families with an adopted child living abroad who meets the adoption requirements.

When to use Form N-600K

  • While the child is under 18, early enough for the interview and oath to happen before the 18th birthday.
  • When the family can travel to the United States for the interview at a USCIS office.
  • Not when the answer to any of Part 1 items 1-3 is No: the form says not to file it then.

What you need before you start

  • The child's full name, other names, date and country of birth, nationality, height, marital status and addresses.
  • The citizen parent's details, how they became a citizen, and their A-Number if they have one.
  • The other parent's name, date and country of birth and nationality.
  • Adoption dates and places, if the child was adopted.
  • Dates the citizen parent (or grandparent) was physically present in the United States.
  • The USCIS office and date range you prefer for the interview, and the filing fee from USCIS's fee schedule.

What’s on Form N-600K

The 2025 edition has 10 pages. FileIt asks for it in 14 parts:

  1. Attorney or accredited representativeAttorney or accredited representative
  2. Part 1. The child's eligibilityApplicant (parent, grandparent or guardian)
  3. Part 2. Person filing this applicationApplicant (parent, grandparent or guardian)
  4. Part 3. The childApplicant (parent, grandparent or guardian)
  5. Part 4. The child's adoptionApplicant (parent, grandparent or guardian)
  6. Part 5. The child's U.S. citizen parentApplicant (parent, grandparent or guardian)
  7. Part 6. The child's other parentApplicant (parent, grandparent or guardian)
  8. Part 7. The child's U.S. citizen grandparent or legal guardianApplicant (parent, grandparent or guardian)
  9. Part 8. Physical presence in the United StatesApplicant (parent, grandparent or guardian)
  10. Part 9. Preferred interview location and datesApplicant (parent, grandparent or guardian)
  11. Part 10. Your contact information and signatureApplicant (parent, grandparent or guardian)
  12. Part 11. InterpreterInterpreter
  13. Part 12. PreparerPreparer
  14. Part 13. Additional informationApplicant (parent, grandparent or guardian)

How to fill out Form N-600K, step by step

1 Parts 1-2: Eligibility and who is filing

Answer the eligibility questions about the child's age, residence and custody, and any armed forces or government posting abroad, then say whether you are the parent, grandparent or guardian.

2 Parts 3-4: The child and any adoption

The child's relationship to the citizen parent, names, birth details, height, addresses and marital status, then the adoption details if the child was adopted.

3 Parts 5-7: Parents, grandparent or guardian

The citizen parent and how they became a citizen, the other parent, and the grandparent or guardian part when it applies.

4 Part 8: Physical presence

List the periods the citizen parent was in the United States, or the grandparent's if the parent lacks five years with two after age 14.

5 Parts 9-13: Interview, contact and signatures

A preferred USCIS office and date range at least 90 days out and before the 18th birthday, your contact details, any interpreter or preparer, and extra space. FileIt prints the child's name and A-Number on the extra page.

Common mistakes to avoid

  • Filing when the child doesn't live in the citizen parent's legal and physical custody abroad.
  • Picking an interview date range that ends after the child turns 18.
  • Leaving out the grandparent's details when relying on the grandparent's physical presence.
  • Typing a name in the signature box: USCIS requires a handwritten ink signature.
  • Answering Yes to loss of citizenship without an explanation in Part 13.

After you fill it out

Print the form, sign Part 10 in ink, and have any interpreter or preparer sign theirs.

Mail it with the evidence and fee to the lockbox for where you are filing from: at the time of writing uscis.gov/n-600k lists Phoenix (Attn: NATZ, P.O. Box 20100) for filings from abroad and Elgin (Attn: NATZ, P.O. Box 4088, Carol Stream) from inside the U.S. Check the page before sending.

Plan travel for the interview and oath. FileIt keeps the finished PDF in your vault.

Fill out Form N-600K online with FileIt

  1. Pick the person. Choose someone from People and FileIt fills in their name, date of birth, address and other details it already knows.
  2. Answer plain-language questions. One part of the form at a time, with the official help text beside each question — 179 fields in all. Your answers save as you go.
  3. Check the live preview. Watch your answers land on the real U.S. Citizenship and Immigration Services (USCIS), Department of Homeland Security form, and let FileIt do any worksheet arithmetic.
  4. Generate the official PDF. FileIt prints your answers into the agency’s own PDF and files it in that person’s folder in your vault.

FileIt fills the form — it never files or submits anything for you. Deliver the finished form to whoever asked for it, the way the form’s instructions say.

Start Form N-600K now — it’s free

Form N-600K: frequently asked questions

What is the difference between Form N-600 and N-600K?

N-600 is for people who already became citizens through a parent, usually while living in the United States. N-600K is for a child living abroad who hasn't become a citizen, so the citizen parent applies for naturalization under section 322.

Does my child have to come to the United States?

Yes. The child has to attend the interview and take the oath in the United States, before turning 18.

Can a grandparent file Form N-600K?

A U.S. citizen grandparent or legal guardian can file only if the child's U.S. citizen parent died during the last five years. A citizen parent can also rely on the grandparent's physical presence in the United States.

How much physical presence does the citizen parent need?

Five years in the United States, at least two of them after age 14. If the parent doesn't have it, the citizen grandparent's physical presence can be used instead.

Can I file Form N-600K online?

Yes, with a USCIS online account. If you are asking for a fee waiver, USCIS says to file the paper form by mail.

How much does Form N-600K cost?

USCIS lists the fee on its fee schedule (Form G-1055). Fees change, so check it before you file.

Official sources

FileIt is not affiliated with or endorsed by U.S. Citizenship and Immigration Services (USCIS), Department of Homeland Security or any government. This page explains the form in general terms and is not legal, tax or immigration advice. Always read the official instructions, and check that you are using the edition the recipient accepts. Page last reviewed 2026-10-19.

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