To fill out a marriage affidavit, you identify both spouses and yourself, describe the marriage in factual detail based on your own firsthand knowledge, add a statement swearing the contents are true under penalty of perjury, and sign the document in front of a notary public. The form is used when an official marriage certificate is unavailable, lost, or not enough on its own for a legal or administrative proceeding. Getting the specifics right is what separates a smooth approval from a rejection letter or a request for more evidence.
What the Affidavit Must Contain
Every marriage affidavit needs the same core data, whether you are working from a court clerk’s template or drafting one from scratch. Immigration regulations lay out the most detailed checklist, and following it will satisfy almost any agency that asks for one. Include each of the following:
- Your full legal name, current residential address, and date and place of birth.
- Your relationship to the couple: how you know the petitioner and spouse (friend, sibling, coworker, neighbor, and so on).
- Both spouses’ full legal names, including maiden names or any prior legal names.
- The date and location of the marriage ceremony, if known.
- A narrative section describing the relationship (see below).
- A penalty-of-perjury statement such as, “I swear, under penalty of perjury, that the foregoing is true and correct to the best of my knowledge.” Federal law gives unsworn declarations subscribed under penalty of perjury the same weight as sworn statements.1Office of the Law Revision Counsel. 28 USC 1746 – Unsworn Declarations Under Penalty of Perjury
- The date and your signature. Do not sign until you are in front of the notary.
Accuracy matters at a granular level. A misspelled name, a wrong wedding date, or an address that does not match other records in the file can trigger a rejection or a formal request for additional evidence. Check every name and date against the couple’s documents before you finalize anything.
Writing the Narrative Section
The narrative is where most people stumble. Agencies do not want emotional testimonials or vague character references. They want concrete, verifiable details that show you have actually observed this couple living as a married unit. For immigration affidavits in particular, the regulations require each affiant to explain “how the person acquired his or her knowledge of the marriage.”2eCFR. 8 CFR 204.2 – Petitions for Relatives, Widows and Widowers, and Abused Spouses and Children
A strong narrative covers several specific points:
- How you met the couple: where, when, and under what circumstances.
- How long you have known them, with a specific timeframe (“I have known John and Maria since 2018”).
- Frequency of contact: how often you see or interact with them.
- Specific observations you witnessed firsthand: attending the wedding, visiting their shared home, meeting their children, celebrating holidays together.
Keep the tone factual and direct. Two or three paragraphs of specific detail are more useful than a full page of generalities. Avoid subjective opinions about the strength of the relationship and stick to what you have personally seen and heard. If you attended the wedding, describe when and where it took place and who else was present. If you know the couple through daily life rather than a ceremony, focus on the shared household, joint activities, and how they present themselves publicly as spouses. Secondhand knowledge (“my sister told me they got married”) does not qualify.
Who Can Sign as the Affiant
The affiant, meaning the person writing and signing the statement, must have personal knowledge of the marriage or the couple’s relationship. That usually means a relative, friend, neighbor, coworker, or anyone who attended the wedding or observed the couple living together as spouses over time.
The affiant must be of sound mind and at least 18 in most states, which is the age of majority that governs competency to testify. Either spouse can provide a sworn statement about their own marriage for Social Security purposes, but most agencies requesting third-party affidavits want someone other than the couple to sign, since the whole point is independent corroboration.
Notarizing the Affidavit
Do not sign the affidavit before you reach the notary. The notary’s entire function is to witness your signature as it happens, verify your identity with a government-issued photo ID such as a driver’s license or passport, and administer an oath or affirmation that the contents are true. After you sign, the notary applies a seal or stamp, records their commission expiration date, and signs the document. That seal is what turns your written statement into a legally recognized sworn document.
Notary fees for a single oath and signature are set by state law and are modest, typically between $2 and $15 per notarial act. Pennsylvania, for example, caps the fee at $5 for administering an oath or affirmation and $5 for witnessing a signature.3Pennsylvania Department of State. Notary Public Fees Banks, shipping stores, and law offices often provide notary services, and many public libraries offer them free of charge.
Remote online notarization is now an option in most of the country. As of early 2025, 45 states and the District of Columbia have enacted permanent laws authorizing notarizations conducted over a live video call. Before using an online notary, confirm that the receiving agency accepts electronically notarized documents. USCIS and some courts still prefer ink-on-paper originals.
If the Affidavit Is in Another Language
An affidavit written in a language other than English must be submitted to a U.S. agency with a certified English translation attached. The translator does not need to be professionally licensed, but they must certify in writing that they are competent to translate between the two languages and that the translation is accurate. The certification should include the translator’s name, signature, address, and the date it was signed.4U.S. Department of State. Information About Translating Foreign Documents
A common format reads: “I [name] certify that I am fluent in the English and [language] languages, and that the attached document is an accurate translation of the document entitled [title].” Attach the certification to the translation and submit both alongside the original-language affidavit. The translator should be someone other than the affiant or either spouse, since agencies view self-translations skeptically.
When a Marriage Affidavit Is Used
The most common trigger is an immigration petition. When a U.S. citizen or lawful permanent resident files USCIS Form I-130 to sponsor a spouse, the agency looks for proof that the marriage is genuine. Federal regulations specifically list “affidavits of third parties having knowledge of the bona fides of the marital relationship” as one of the evidence types a petitioner should submit alongside joint property records, shared financial accounts, and similar documentation.2eCFR. 8 CFR 204.2 – Petitions for Relatives, Widows and Widowers, and Abused Spouses and Children The I-130 instructions repeat this requirement and spell out what each affidavit must contain.5U.S. Citizenship and Immigration Services. Instructions for Form I-130, Petition for Alien Relative
The Social Security Administration also accepts these statements. When applying for spousal or survivor benefits where a marriage certificate cannot be obtained, SSA asks for “a signed statement of the clergyman or official who held the marriage ceremony, or other convincing evidence of the marriage.”6Social Security Administration. 20 CFR 404.725 – Evidence of a Valid Ceremonial Marriage A sworn affidavit from a wedding attendee or someone who witnessed the couple’s married life can meet that standard, particularly when a fire or natural disaster has destroyed local records.
Marriage affidavits also come up in common-law marriage states, where no ceremony or license exists to prove the union. SSA regulations require statements from the couple along with statements from “blood relatives” or other people who know about the marriage when evaluating these claims.7Social Security Administration. 20 CFR 404.726 – Evidence of Common-Law Marriage Similar affidavits appear in probate cases where a surviving spouse needs to establish inheritance rights, and in employer health-plan enrollments during a special enrollment period when a marriage certificate is not available.
What a False Statement Costs
Signing a marriage affidavit is not a casual favor. Because the document is executed under penalty of perjury, knowingly making a false statement carries real criminal exposure. Under federal law, perjury is punishable by up to five years in prison.8Office of the Law Revision Counsel. 18 USC 1621 – Perjury Generally A separate statute covering false statements made to a federal agency carries the same five-year maximum.9Office of the Law Revision Counsel. 18 USC 1001 – Statements or Entries Generally
In practice, USCIS treats fraudulent marriage affidavits as evidence of immigration fraud, which can result in denial of the petition, deportation of the beneficiary, and a permanent bar on future immigration benefits for both the petitioner and the person who signed the false statement. The affiant does not have to be one of the spouses to face consequences. Anyone who knowingly signs a false affidavit is exposed. If you are unsure about a detail, say so (“to the best of my recollection”) rather than guessing. Hedging honestly is always safer than stating something you cannot verify.