An affidavit letter for an immigration marriage case is a signed statement from someone who knows you and your spouse personally, describing what they have seen of your relationship and confirming, under penalty of perjury, that the marriage is real. It supplements the primary evidence in a Form I-130 petition, like the marriage certificate, joint lease, and shared financial records, by giving USCIS an outside perspective from someone with firsthand knowledge. USCIS policy guidance recommends submitting at least two of these letters from people who are not parties to the petition.1U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 6, Part B, Chapter 6 – Spouses
Who Can Write One
Any person with direct personal knowledge of the marriage can write one. The federal regulation requires only that the writer “have personal knowledge of the marital relationship.”2eCFR. 8 CFR 204.2 – Petitions for Relatives, Widows and Widowers, and Abused Spouses and Children Close friends, neighbors, coworkers, family members, religious leaders, and community figures all qualify if they have spent real time around both of you as a couple.
Contrary to a common misconception, the writer does not have to be a U.S. citizen or lawful permanent resident, and no particular age is required. What matters is firsthand knowledge. A vague letter from someone who barely knows you carries little weight; a detailed account from a longtime friend who has watched the relationship develop over years can meaningfully strengthen the case. Choosing writers from different parts of your life helps too. One friend from work and one family member, for example, can each describe different sides of the relationship.
What the Letter Must Contain
Under 8 CFR 204.2(a)(1)(iii)(B)(5), every affidavit needs three specific pieces of information about the writer and their knowledge of the couple:
- The writer’s full legal name, current address, and date and place of birth.
- How the writer knows the petitioner and the beneficiary, including any family or social connection.
- A complete explanation of how and when the writer came to know the couple and observe the marriage firsthand.
Beyond these required elements, the letter should describe specific things the writer personally witnessed. Generic statements like “they seem happy together” do almost nothing. What helps: the writer attended your wedding, helped you move into a shared apartment, spent a holiday at your home, or watched one spouse care for the other during an illness. Dates, locations, and the names of others present make the account verifiable. Officers read many of these letters and can spot templated language quickly.
It also helps to describe how you function as a household. Joint decision-making, shared finances, plans for children, or simply how you interact when no one is putting on a show all point to a genuine partnership.
A Sample Letter You Can Adapt
Replace bracketed fields with real information and rewrite the details to match the writer’s actual experiences. Copying this word-for-word will not help you; the specifics are what make the letter credible.
I, [Writer Name], born on [Date] in [City, Country], currently residing at [Address], submit this statement in support of the marriage between [Spouse A] and [Spouse B].
I have known [Spouse A] for over ten years through our mutual employment at a regional medical facility. I first met [Spouse B] at a dinner party at the couple’s shared apartment in the spring of [Year]. Since then, I have spent numerous weekends with them, including a trip to the mountains during winter [Year].
During [Year], [Spouse A] was recovering from a medical procedure. I visited their home several times and saw [Spouse B] managing daily care, picking up prescriptions, and handling household responsibilities. Our families get together regularly for monthly dinners, where I have seen them coordinate schedules, discuss financial plans, and talk about having children. They share a home at [Address] and are recognized as a married couple by everyone in our social circle.
Based on my personal observations over the past [number] years, I believe their marriage is genuine and built on mutual commitment.
I declare under penalty of perjury that the foregoing is true and correct. Executed on [Month] [Day], [Year], in [City, State].
[Signature]
[Printed Name]
[Phone Number]
How to Write It So It Actually Helps
A workable structure runs from introduction to observations to declaration:
- Opening paragraph: the writer’s name, where they live, how they know the couple, and how long.
- Middle paragraphs: two to four specific events or observations, with approximate dates and locations. Focus on details only someone with genuine knowledge would know.
- Closing paragraph: a plain statement that, based on what the writer has personally seen, the marriage is real.
- Legal declaration: the penalty-of-perjury sentence.
Keep the tone honest and conversational. This is not a legal brief, and it should not read like one. The best letters sound like someone telling a friend about a couple they know well. The writer should sign and date the document, and including a phone number is smart, because USCIS officers occasionally contact affiants to verify their statements.
The Penalty-of-Perjury Language
Under 28 USC 1746, an unsworn written declaration carries the same legal weight as a sworn affidavit, provided it includes a specific penalty-of-perjury statement.3Office of the Law Revision Counsel. 28 USC 1746 – Unsworn Declarations Under Penalty of Perjury The wording depends on where the writer signs:
- Signed inside the United States: “I declare under penalty of perjury that the foregoing is true and correct. Executed on [date].”
- Signed outside the United States: “I declare under penalty of perjury under the laws of the United States of America that the foregoing is true and correct. Executed on [date].”
Using the wrong version does not automatically invalidate the letter, but matching the writer’s location avoids any question. Notarization is not strictly required when the declaration includes this language, though USCIS policy notes that an affidavit lacking a sworn statement may be treated as less persuasive.4U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 4, Part C, Chapter 4 – Documentation and Evidence
If the Writer Doesn’t Speak English
The letter can be written in another language, but a complete English translation must accompany it. Under 8 CFR 103.2(b)(3), every foreign-language document submitted to USCIS needs a translator’s certification stating that the translation is complete and accurate and that the translator is competent to translate from that language into English. The translator does not have to be a professional, but the certification must be a separate signed statement attached to the translation. A professional certified translation of a single-page document typically runs about $25 to $35, though prices vary.
Don’t Confuse This With Form I-864
The marriage affidavit is not the same as Form I-864, Affidavit of Support, and the two documents are often mixed up. The marriage affidavit is an informal third-party letter about the relationship; it has no form number and creates no legal obligation for the writer. Form I-864 is a legally enforceable contract in which the petitioning spouse, and sometimes a joint sponsor, agrees to financially support the immigrant at or above 125 percent of the federal poverty guidelines.5U.S. Citizenship and Immigration Services. Affidavit of Support That obligation generally lasts until the sponsored spouse naturalizes or earns credit for roughly 40 qualifying quarters of work, and divorce does not end it. Both come up in a marriage-based case, but only the marriage affidavit is what a friend or relative writes to describe the relationship.
Consequences of Lying
A false affidavit in an immigration case exposes the writer to serious federal penalties. Perjury, covering willfully stating something untrue in a declaration under penalty of perjury, carries up to five years in prison.6Office of the Law Revision Counsel. 18 USC Chapter 79 – Perjury Making false statements to a federal agency is a separate crime, also punishable by up to five years.7Office of the Law Revision Counsel. 18 USC 1001 – Statements or Entries Generally Immigration document fraud can bring up to ten years for a first offense.8Office of the Law Revision Counsel. 18 USC 1546 – Fraud and Misuse of Visas, Permits, and Other Documents A false affidavit can also lead to denial of the petition, deportation of the beneficiary, and prosecution of both the writer and the couple. Signing the declaration is a serious legal act, not a casual favor.
Where the Letter Goes in Your Filing
The finished affidavit belongs in the supporting evidence section of the I-130 petition packet, alongside the marriage certificate, joint lease, shared financial records, and photographs. If you file electronically, upload a high-quality scan of the signed original. There is no separate fee for the affidavit itself. USCIS may request additional affidavits later, particularly during the adjustment-of-status stage on Form I-485, if the initial evidence left questions about the relationship. If a Request for Evidence arrives, repeating the same general statements rarely helps; new letters from different people, or more detailed accounts from the original writers that address the officer’s specific concerns, carry far more weight.9U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 1, Part E, Chapter 6 – Evidence