Updated November 11, 2026

Evidence for a K-1 visa: complete checklist from Form I-129F to your interview

Evidence for a K-1 fiancé(e) visa is submitted in two main stages: first with your Form I-129F petition to USCIS, and later at your consular interview with the Department of State. According to the USCIS Form I-129F instructions (01/20/25 edition), you must prove U.S. citizenship, legal termination of any prior marriages, mutual intent to marry within 90 days of U.S. admission, and that you met in person at least once in the 2 years before filing. In FY 2024, USCIS completed 68,400 Form I-129F petitions according to the USCIS FY 2024 Annual Statistical Report.

How K-1 visa evidence works across the 5 government stages

A K-1 visa case moves through three federal agencies: U.S. Citizenship and Immigration Services (USCIS), the U.S. Department of State (DOS), and U.S. Customs and Border Protection (CBP). Each stage checks different documents.

In FY 2024, USCIS received 43,200 Form I-129F petitions and completed 68,400 cases, according to the USCIS FY 2024 Annual Statistical Report. By our calculation from that report, USCIS completed about 1.58 Form I-129F petitions for every new petition received that year, clearing roughly 25,200 more cases than came in.

Under the USCIS Policy Manual (Volume 1, Part E, Chapter 6), officers judge your K-1 visa evidence under the preponderance of the evidence standard. That means your documents must show that each eligibility requirement is more likely than not to be true. You must meet every requirement on the day you file and continue to meet it through adjudication.

• Stage 1 (USCIS Form I-129F petition): The U.S. citizen petitioner files Form I-129F at the USCIS Dallas Lockbox with initial evidence of citizenship, freedom to marry, intent to marry within 90 days, and meeting in person within 2 years.
• Stage 2 (DOS consular visa interview): After USCIS approves the petition and sends it through the National Visa Center (NVC) to the embassy or consulate, the foreign fiancé(e) brings relationship proof, a medical exam report, and financial support evidence (Form I-134) to the visa interview.
• Stage 3 (CBP port of entry inspection): The K-1 visa is valid for up to 6 months for a single entry. At the border, CBP inspects the traveler, collects biometrics, and admits them for a 90-day period to marry the U.S. citizen petitioner.
• Stage 4 (USCIS Form I-485 adjustment of status): After marrying within 90 days, the foreign spouse files Form I-485 with the marriage certificate, Form I-94 arrival record, and Form I-864 Affidavit of Support.
• Stage 5 (USCIS Form I-751 removal of conditions): If the marriage is less than 2 years old when lawful permanent residence is granted, USCIS issues a 2-year conditional Green Card. Both spouses must file Form I-751 in the 90 days before that card expires.

Checklist of required initial evidence for Form I-129F

When the U.S. citizen petitioner mails Form I-129F to the USCIS Dallas Lockbox (P.O. Box 660151 in Dallas, TX for USPS, or 2501 South State Highway 121 Business, Suite 400 in Lewisville, TX for courier deliveries), the packet must include every piece of required initial evidence listed in the Form I-129F instructions (01/20/25 edition).

If required initial evidence is missing, USCIS has the discretion under its Policy Manual to deny the petition outright without first sending a Request for Evidence (RFE), or to issue an RFE.

• Proof of the petitioner's U.S. citizenship: Submit a legible copy of a U.S. birth certificate issued by a civil authority, a copy of your original Certificate of Naturalization, a copy of your original Certificate of Citizenship, a copy of Form FS-240 (Consular Report of Birth Abroad), a copy of an unexpired U.S. passport or passport card issued with a validity period of at least 5 years, or an original statement signed by a U.S. consular officer certifying you are a U.S. citizen with a valid passport.
• Proof of legal termination of all prior marriages: If either partner was ever married before, submit copies of final divorce decrees, annulment orders, or death certificates issued by a civil authority for every prior marriage.
• Passport-style color photographs: Submit one color photo of the U.S. citizen petitioner and one of the foreign fiancé(e), both taken within 30 days of filing. Each photo must measure 2 by 2 inches on thin glossy paper with a white to off-white background, full-face frontal view, head height of 1 to 1 3/8 inches, and eye height between 1 1/8 and 1 3/8 inches from the bottom. Lightly print the person's name and A-Number (if any) on the back with a pencil or felt pen.
• Proof of legal name change: If either partner uses a name different from the name on the supporting documents, include a copy of the marriage certificate, adoption decree, or court order showing the change.
• Form I-94 Arrival/Departure Record details: If CBP or USCIS issued the beneficiary a Form I-94, provide the Form I-94 number and expiration date shown on the record. Travelers can print a paper copy of an electronic Form I-94 from the CBP I-94 website or the CBP Link mobile app.
• Statements of intent to marry within 90 days: Provide signed statements from both the U.S. citizen petitioner and the foreign fiancé(e) confirming a bona fide intention to marry each other within 90 days of the fiancé(e)'s admission as a K-1 nonimmigrant, or other evidence establishing mutual intent.
• Proof of meeting in person within 2 years: Provide documentary evidence that you were in each other's physical presence during the 2 years immediately before filing, or evidence for a statutory waiver.
• International Marriage Broker (IMB) consent form (if applicable): If you met through an IMB, provide the IMB's contact details and a copy of the signed, written consent form the IMB obtained from your fiancé(e) authorizing the release of their personal contact information to you.
• Certified criminal and court records (if applicable): If the petitioner was ever subject to a protection or restraining order or arrested or convicted for specified crimes under the International Marriage Broker Regulation Act (IMBRA), or arrested, cited, charged, indicted, convicted, fined, or imprisoned for any other offense (excluding traffic incidents that were not alcohol- or drug-related and did not involve a significant fine), submit court-certified copies of the police and court records showing charges and dispositions, even if sealed or expunged.

How to prove the 2-year in-person meeting requirement and intent to marry

Under the Form I-129F instructions, you and your fiancé(e) must have met in person at least once during the 2-year period immediately before the date you file Form I-129F. You also have to show that both of you have a bona fide intent to establish a life together and marry within 90 days of entry.

The Form I-129F instructions list specific examples of evidence that prove your in-person meeting and mutual intent to marry. Combining written statements with dated travel records makes it easy for an adjudicator to verify when and where you were together.

• Written statement of meeting circumstances: Part 2, Item Number 54 of Form I-129F asks you to describe the circumstances of your in-person meeting. You and your fiancé(e) can also attach signed written statements giving the exact dates, cities, and circumstances of your time together.
• Airline tickets and passport pages: Submit copies of airline tickets and passport pages showing entry and exit stamps that place both partners in the same country or city on the same dates.
• Signed statements of intent to marry: Include two separate, signed statements, one from the U.S. citizen petitioner and one from the foreign fiancé(e), stating that you are legally free to marry and intend to marry each other within 90 days of the fiancé(e)'s admission to the United States on a K-1 visa. USCIS accepts a photocopied, faxed, or scanned copy of an original document containing a handwritten ink signature, while stamped or typed signatures are rejected.
• Exemption for foreign cultural or social practice: If you did not meet in person within the past 2 years because doing so would violate strict and long-established customs of your fiancé(e)'s foreign culture or social practice, you must request a waiver and submit evidence (such as statements from religious leaders) showing the custom and proving that all aspects of the traditional arrangements have been or will be met.
• Exemption for extreme hardship to the petitioner: If you request a waiver because meeting in person would result in extreme hardship to the U.S. citizen petitioner, submit supporting evidence such as medical records or evidence of immediate danger.

Evidence for the K-1 visa interview and Form I-134 financial support

Approving Form I-129F means USCIS recognizes your intended marriage, but it does not guarantee a visa. Once the National Visa Center sends the approved petition to the U.S. embassy or consulate where your fiancé(e) lives, DOS conducts background and fingerprint checks on the applicant.

According to the USCIS K-1 Process Guide, the foreign fiancé(e) must bring proof of the relationship and proof of a medical examination to the consular visa interview. If the consular officer finds that the relationship is not bona fide, DOS will not issue the K-1 visa and will return the Form I-129F petition to USCIS.

DOS also requests Form I-134, Declaration of Financial Support, to confirm that the K-1 beneficiary has sufficient financial support during their temporary stay in the United States. Under the Form I-134 instructions (01/20/25 edition), the supporter signs Form I-134 under penalty of perjury (no notary is needed) and must file a separate Form I-134 for each beneficiary, such as an accompanying K-2 child.

• Supporter's immigration status proof for Form I-134: A U.S. citizen supporter submits a copy of a birth certificate, certificate of naturalization, certificate of citizenship, consular report of birth abroad, or the biographic data page of a U.S. passport.
• Bank officer statement: A statement from an officer of the bank or other financial institution with deposits, identifying three required items: the date the account was opened, the total amount deposited for the past year, and the present balance.
• Employer statement on business stationery: A letter from the supporter's employer on business letterhead showing the date and nature of employment, the salary paid, and whether the position is temporary or permanent.
• Federal income tax return or pay records: A copy of the last U.S. federal income tax return filed (tax transcript). On Form I-134 Item Number 17, if you filed a federal return, you enter the adjusted gross income from IRS Form 1040. If you did not file a federal tax return, or if it does not properly reflect your current income, submit copies of consecutive pay statements (stubs) for a minimum of the past month, a recent Form W-2, or Form SSA-1099.
• Bond list or asset proof (if using assets): If relying on bonds, provide a list containing serial numbers, denominations, and the record owner's name. Any assets listed on Form I-134 must be convertible into cash within 12 months. If claiming the net value of a home, you must include proof of ownership, a recent appraisal by a licensed appraiser, and evidence of all loans secured by a mortgage, trust deed, or lien. You cannot include the net value of an automobile unless you own more than one automobile and exclude at least one.
• Proof of relationship and medical examination: Bring updated proof of the bona fide relationship and proof of the immigration medical examination to the consular interview.

Government filing fees and rules for copies, translations, and prohibited items

Every petition and application in the K-1 process must follow USCIS rules on fees, photocopies, translations, and prohibited items. Submitting an incorrect fee or an unsigned form causes an automatic rejection at the USCIS Lockbox.

When paying by mail at a USCIS Lockbox, you can pay by credit, debit, or prepaid card using Form G-1450, or by electronic funds transfer from a U.S. bank account using Form G-1650 (unless you file Form G-1651 for a paper fee payment exemption). Cash is never accepted.

Fees from uscis.gov (Form G-1055, edition 10/26/26), as of November 2026

Formatting rules, secondary evidence, and RFE deadlines

Before sealing your Form I-129F packet, check your supporting documents against the formatting rules in the Form I-129F instructions and Volume 1, Part E, Chapter 6 of the USCIS Policy Manual.

If USCIS needs more evidence after you file, it may issue a Request for Evidence (RFE) or a Notice of Intent to Deny (NOID). Under the USCIS Policy Manual, you must submit all requested materials together at one time. Sending only part of what an RFE asks for is treated as a request for a final decision on the record.

• Send legible photocopies, not originals: Do not send original civil documents unless the instructions or USCIS specifically ask for them. Unsolicited original documents submitted to USCIS may be destroyed. Keep your originals safe in case USCIS requests them later or for the consular interview.
• Full certified English translations: Any document containing a foreign language must include a full English translation (summaries are not acceptable). The translator must sign a certification stating that the English translation is complete and accurate and that they are competent to translate from the foreign language into English, along with their printed name, signature date, and contact information.
• Items you must never put in a USCIS packet: USCIS will not accept anything containing electronic chips or batteries (such as musical greeting cards), non-paper items (such as CD-ROMs, DVDs, thumb drives, toys, or action figures), biological or genetic DNA samples, or graphic photos of childbirth or intimate relations. You may submit paper photographs or copies of physical items instead.
• When primary civil records are unavailable: If a required primary document (such as a birth certificate) does not exist, you must provide an original written statement on government letterhead from the relevant civil authority explaining why the record does not exist and whether similar records for that time and place exist (unless the DOS Reciprocity and Civil Documents webpage already shows the document is generally unavailable in that country). You must then submit secondary evidence such as church, school, baptismal, or U.S. census records. If secondary evidence is also unavailable, prove its unavailability and submit two or more sworn affidavits from non-parties who were living at the time and have direct personal knowledge of the event.
• RFE and NOID response deadlines: Under the USCIS Policy Manual, the maximum response time for a Form I-129F RFE is 84 calendar days (12 weeks), plus 3 additional days when USCIS mails the RFE, for a maximum of 87 days from the mailing date. For a NOID, the standard response time is 30 calendar days, plus 3 mailing days if sent by mail (33 days total).

Evidence needed after U.S. entry: marriage, K-2 children, and Form I-485

Once CBP admits your fiancé(e) on a K-1 visa, the 90-day clock starts. K-1 and K-2 nonimmigrant status automatically expires after 90 days and cannot be extended. You must marry the same U.S. citizen who filed Form I-129F within those 90 days.

After marriage, your new spouse applies for a Green Card by filing Form I-485 with USCIS. Under Volume 7, Part B, Chapter 7 of the USCIS Policy Manual, a K-1 nonimmigrant can only adjust status based on marriage to the U.S. citizen who filed the Form I-129F petition. If the couple entered into a valid, bona fide marriage within the 90-day window, the K-1 entrant remains eligible to adjust status on that basis even if the marriage is later legally terminated by death, dissolution, or divorce before Form I-485 is decided.

If your fiancé(e) has unmarried children under 21, you must list their names on Form I-129F so they can apply for K-2 visas. You do not need to file a separate Form I-129F for a K-2 child. They may travel with the K-1 parent or follow to join later, and they can apply for a Green Card on Form I-485 alongside or after the K-1 parent, provided they remain unmarried and under 21 upon admission.

• Copy of Form I-797 Approval Notice for the Form I-129F petition.
• Copy of your marriage certificate showing marriage within 90 days of K-1 admission.
• Copy of your birth certificate and a copy of a government-issued identity document with a photograph.
• Copies of your passport page with the K-1 (or K-2) nonimmigrant visa and the passport page with the U.S. immigration officer's admission or parole stamp.
• Copy of Form I-94, Arrival/Departure Record (printed from the CBP I-94 website or CBP Link app if issued electronically).
• Two passport-style photographs.
• Form I-864, Affidavit of Support Under Section 213A of the INA (or Form I-864EZ, if applicable).
• Form I-693, Report of Immigration Medical Examination and Vaccination Record, or a partial Form I-693 showing vaccination compliance (if you already completed a medical exam abroad before arriving, you may only need to submit proof that you complied with the vaccination requirements).
• For K-2 derivative children filing Form I-485: also include a copy of documentation showing the relationship to the K-1 parent (such as a birth certificate or adoption decree) and a copy of the K-1 parent's Form I-485 receipt or approval notice or Green Card.
• Optional work and travel applications: A K-1 entrant can file Form I-765 for work authorization immediately upon arrival (valid only for the 90-day admission window) or file Form I-765 together with Form I-485 (valid for 1 year and renewable in 1-year increments). To travel outside the U.S. while Form I-485 is pending without abandoning the application, file Form I-131 for an advance parole document.

Practice example

How and when did you and your fiancé(e) meet in person, and what are your plans to marry after you arrive in the United States?

A strong, honest answer gives the exact dates, city, and circumstances of your in-person meeting within the 2-year window before Form I-129F was filed, matching what your petitioner wrote in Part 2, Item Number 54 of Form I-129F. State clearly how you first connected, including whether you met through an International Marriage Broker, and name each trip you took to see each other in person. Next, explain your concrete plan to marry within the mandatory 90-day admission period after entering the United States, and identify the U.S. address where you intend to live (matching Part 2, Item Numbers 45.a. to 46 of your petition). Have your organized folder ready at the window with copies of the airline tickets, passport entry and exit stamps, dated photographs together, and both signed statements of intent to marry so you can hand any page to the consular officer immediately if asked.

The consular officer is verifying two core K-1 statutory requirements: that you met in person during the 2 years before filing Form I-129F, and that your relationship is bona fide with a genuine plan to marry within 90 days of U.S. entry.

This is interview practice, not legal advice. For questions about your own case, talk to an immigration attorney. Visaful is not affiliated with the U.S. government or the Department of State.