An I-130 affidavit is a signed statement from someone outside your marriage who describes what they have personally seen of your relationship.

USCIS does not require affidavits, but the letters can help strengthen any I-130 petition package. Under 8 CFR 204.2, a spousal petition must include a photo of each spouse, a civil marriage certificate, and proof that every earlier marriage legally ended. You use affidavits when your documentary evidence is thin, not because a rule says you must.

An affidavit is your chance to explain a gap. Say you and your spouse live on separate continents. A letter from your sister describing the six weeks she spent with you both in Manila does work no bank statement can do. If you already have a joint lease, three years of joint tax returns, and a shared child, affidavits add little. Spend your energy on the bona fide marriage documents first.

Immigration paperwork calls that person the affiant. The regulation describing these letters sets no citizenship requirement, no residency requirement, and no age requirement. It asks for one thing: personal knowledge of the marital relationship.

Your mother may write one. So may your landlord, your roommate, your pastor, or the friend who drove you to the airport whenever your spouse flew home. The regulation expects the letter to state the writer's relationship to you both, which tells you family members qualify.

Choose people who have actually spent time in the same room as the two of you. A cousin who has met your spouse twice over video will produce a vague letter, and a vague letter is worse than no letter. Two to five people who know you well is a reasonable target. Nothing in the regulation sets a number, so more is not automatically better.

The regulation warns that an immigration officer may ask an affiant to testify about what the letter says. While that rarely happens, mentioning this to your writer is appropriate. Plus, it tends to produce more careful writing.

Give your writer these five elements. They come from 8 CFR 204.2(a)(1)(iii)(B)(5), the one place the immigration regulations describe what a marriage affidavit should say. It's a good checklist of components for a letter's contents.

One misconception that CitizenPath sees among petitioners is the need for notarization. Notarization is not required. Under 28 U.S.C. § 1746, a written statement signed under penalty of perjury carries the same force as a sworn affidavit in federal matters. The statute gives two versions of the closing line, and the correct one depends on where the writer signs.

Signed inside the United States: "I declare under penalty of perjury that the foregoing is true and correct."

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."

That second version matters for spousal cases more than most. Your witnesses are often abroad, and the shorter line is the wrong one for them.

Most affidavits fail in the same way. The writer states a conclusion and never shows the officer how they reached it. "They are deeply in love and clearly committed to each other" tells a reviewing officer nothing that could be checked, contradicted, or corroborated.

That matters because of the specific question an officer is answering. USCIS is deciding whether you married for immigration purposes, and it weighs your evidence against the timeline on your Form I-130 and against whatever the two of you say at a green card interview. A letter full of verifiable events gives the officer something to line up. A letter full of adjectives gives them nothing, and consistency across sources is what marriage-based green card interview questions are designed to test.

Compare the two columns below. Both sentences say the couple is close. Only one gives an officer something to work with.

Ask each writer for two or three moments they personally witnessed, with a date and a place attached. It also helps if the details in the letters line up with what you reported on Form I-130, since conflicting dates raise questions rather than settle them.

• Sending four copies of the same letter. Identical phrasing across multiple affidavits signals a template. Give each writer the sample and the checklist, then let them write in their own words.
• Leaving out the writer's place of birth or address. These are two of the five elements the regulation names, and they are the two most commonly missing from sample letters circulating online. A letter without them is incomplete on its face.
• Using dates that conflict with your petition. If a friend writes that she attended your wedding in June and your marriage certificate says September, you have created a problem where none existed. It is your job to ensure consistency before submitting the affidavits to USCIS. It's worth avoiding a timeline inconsistency that causes an RFE or denial.
• Treating affidavits as a substitute for documents. The regulation says affidavits should be supported, where possible, by the documentary evidence listed alongside them. Letters supplement joint accounts, leases, photos, and travel records. They do not replace them. Work through an I-130 checklist first, then decide where affidavits fill a real hole.

In our experience, couples early in their marriage often worry that their evidence looks thin — no joint mortgage, no shared tax returns, no children. The rules ask for documents where possible, which leaves room for couples who don't have many. A letter can't replace a joint bank account. But it can show an officer real dates, places, and things someone saw firsthand.

These questions come up again and again from people preparing a spousal petition. They often center around around whether the letter needs a notary, how many letters to send, who is allowed to write one, and whether letters can stand in for documents the couple does not have.