An affidavit of marriage is a sworn, notarized written statement confirming that two people are legally married. Couples sign one themselves, or a friend or relative signs one on their behalf, when a marriage certificate is missing, delayed, or when an agency wants personal testimony about the relationship on top of the usual paperwork. Because the signer swears to the contents under oath, the document carries legal weight, and a knowingly false statement can be prosecuted.
When You Would Use One
The most common reason is a missing or delayed marriage certificate. Certificates get lost in moves, destroyed in disasters, or simply take weeks to arrive from the issuing office. An affidavit fills the gap while you wait for a replacement or when the original record no longer exists.
Beyond that, specific agencies ask for affidavits as part of their own verification process. U.S. Citizenship and Immigration Services uses them heavily in marriage-based green card cases, often requesting sworn statements from the couple and from people who know them personally. The Social Security Administration has its own form, the Statement of Marital Relationship (SSA-754), that it uses when someone applies for spousal or survivor benefits and the standard records are incomplete. Health insurance carriers, banks, and mortgage lenders occasionally accept a notarized affidavit as a supplemental document when adding a spouse to a policy or account, though most prefer the certificate itself.
What an Affidavit Cannot Do
An affidavit is secondary evidence. It supplements an official marriage certificate; it does not carry the same authority. Several common tasks still require the certified certificate itself:
- Changing your name on a driver’s license at the state motor vehicle agency.
- Updating your name with the Social Security Administration.
- Changing your name on a U.S. passport.
If your certificate is missing and you need it for one of these purposes, the right move is usually to order a certified replacement copy from the vital records office in the state or county where you married.
What the Document Should Contain
At a minimum, an affidavit of marriage should include:
- Both spouses’ full legal names as they appear on government ID.
- Dates of birth for both spouses.
- Current residential address of each spouse.
- The exact date and location of the marriage, including city, county, and state.
- A sworn declaration that the information is true, made under penalty of perjury.
If a third party is signing rather than the spouses themselves, the affidavit should also give that person’s full name, address, date and place of birth, their relationship to the couple, and a clear explanation of how they personally know the marriage is real.
Use in Immigration Cases
Immigration is where marriage affidavits see their most formal use. When a U.S. citizen or lawful permanent resident files Form I-130 to sponsor a spouse for a green card, USCIS expects evidence that the marriage is genuine and not entered into solely to obtain an immigration benefit. Affidavits from friends, family, coworkers, and community members who have witnessed the relationship firsthand are a standard part of that evidence package.
The I-130 instructions ask that each third-party affidavit include the affiant’s full name and address, date and place of birth, and the full details of how the person came to know the couple and their marriage. USCIS policy treats these affidavits as secondary evidence that supplements primary documents like the marriage certificate. The agency suggests submitting two or more affidavits from people who are not parties to the petition and who have direct personal knowledge of the relationship. An affidavit missing the sworn statement, the affiant’s address, or evidence of personal knowledge is not automatically rejected, but it carries less weight and may not be enough on its own.
Marriage Fraud Penalties
Federal law makes it a crime to knowingly enter into a marriage to evade immigration laws. The penalty is up to five years in prison, a fine of up to $250,000, or both. Making a false statement to a federal agency carries its own separate penalty of up to five years in prison. These consequences reach everyone involved: the sponsored spouse, the petitioner, and any witness who signs a false affidavit. A fraudulent affidavit submitted as supporting evidence can also result in permanent bars from future immigration benefits for the foreign-born spouse.
Proving a Common Law Marriage
Roughly a dozen jurisdictions recognize common law marriage, among them Colorado, Iowa, Kansas, Montana, South Carolina, Texas, and Utah, with a few others recognizing it through case law. Because there is no marriage certificate in these cases, affidavits often become the central proof.
USCIS policy lists an affidavit of marriage as one form of evidence couples can submit to show they meet the requirements for a common law marriage in their state.
The Social Security Administration handles it differently. If both spouses are alive, SSA asks for a sworn statement from each spouse plus a statement from a blood relative of each. If one spouse has died, the surviving spouse provides a statement along with statements from two blood relatives of the deceased. The statements must be made on SSA’s designated forms, written in the signer’s own words, and supported by documents like joint bank statements, insurance policies, or mortgage records showing a shared life.
Drafting and Notarizing the Affidavit
Many organizations that request affidavits provide their own templates. SSA’s Statement of Marital Relationship form is available online and at local field offices. For other purposes, a general affidavit template can be adapted to cover the required details.
The document has no legal force until it is notarized. The signer, whether that is a spouse or a third-party witness, must appear before a notary public, present valid government-issued identification, take an oath or affirmation that the contents are true, and sign the document in front of the notary, who then applies the official seal.
Fees are modest. Most states cap the charge for administering an oath and witnessing a signature at between $2 and $15. Nearly all states now also permit remote online notarization, where the signer appears over a live video call. Remote notarization fees run slightly higher, with most state caps falling between $10 and $30. Before going the remote route, check whether the agency receiving the document accepts remotely notarized affidavits; some still require in-person notarization.
Penalties for a False Affidavit
A false affidavit is not a minor paperwork problem. Because the signer takes an oath, a knowingly false statement can be prosecuted as perjury under federal or state law. Federal perjury carries a potential sentence of up to five years in prison.
In immigration contexts the consequences stack with the marriage fraud statute described above. Outside immigration, a false affidavit submitted to an insurance company or financial institution can trigger fraud charges under state law. Any institution that accepts an affidavit can refer a false one for prosecution, so treat the oath as what it is.