Immigration support letters

Letter of support for immigration: samples and how to write one

Last updated 2026-10-01

A letter of support for immigration is a signed statement from someone who knows the applicant, written to help a U.S. immigration officer or judge understand a relationship or a person’s character. The right content depends on the case: marriage green cards need first-hand facts about the couple, court cases need specific evidence of character, and visitor visas rarely benefit from one at all.

First, identify which letter you are writing

“Letter of support” covers several very different documents. Writing the wrong kind is the most common mistake. Find your situation below.

• A friend or relative is applying for a marriage-based green card (I-130, I-485, or I-751 to remove conditions). You are confirming the marriage is real. → Marriage affidavit samples
• Someone is in immigration court, a bond hearing, or applying for a waiver or naturalization, and their lawyer asked for letters about their character. → Character reference letters
• Your relative wants a visitor visa to see you in the U.S. → Visitor visa support letters (read this one first — it may save you the effort).
• An employer, professor or expert is supporting a work visa or employment-based green card (H-1B, O-1, EB-1, EB-2 NIW). These are technical expert letters, usually drafted with the petitioner’s attorney, and are outside the scope of this page.
• An “affidavit of support” (Form I-864) is not a letter at all — it is a financial sponsorship form with legal obligations. Use the official USCIS form and instructions.

The structure every good support letter shares

1. Who you are. Full name, address, occupation, and — for USCIS affidavits — date and place of birth. Your immigration status if you are a U.S. citizen or permanent resident.
2. How you know the person, and for how long. Concrete: “We have worked at the same hospital since 2019,” not “I have known her for a long time.”
3. Specific things you have personally seen. Dated events and everyday details. This is the part officers actually weigh.
4. Why it matters — briefly, in your own words. No legal arguments.
5. A truthfulness statement, signature and date. Often “I declare under penalty of perjury that the foregoing is true and correct,” or a notarized signature.
6. Contact details and, if the attorney asks, a copy of your ID or proof of status.

Never sign a letter that contains something you did not see or do not know to be true. Writers can be contacted, and USCIS forms warn that affiants may be asked to testify about their statements.

Marriage support letters

For marriage-based cases, USCIS lists “affidavits sworn to or affirmed by third parties having personal knowledge” of the marriage as supporting evidence. The I-130 and I-751 instructions both ask that each one include the writer’s full name and address, date and place of birth, and complete details explaining how the writer knows about the marriage.

Full-length versions: I-751 affidavit sample, affidavit of bona fide marriage, from a friend, from a parent.

Character reference letters

In immigration court (including bond hearings and applications such as cancellation of removal), in waiver applications, and sometimes in naturalization cases, the decision-maker weighs the person’s character, family ties and contributions. Letters from employers, clergy, neighbors, teachers and family help show who the person is outside the file.

• Address court letters to the judge (“Honorable Immigration Judge”) unless the attorney says otherwise.
• Say how long and in what capacity you have known the person.
• Give two or three specific examples — the shifts they covered, the neighbor they helped, the kids they coach.
• If you know about the problem that brought them to court, acknowledge it honestly. A letter that pretends nothing happened is easy to discount.
• Describe what their absence would mean to family, work and community, in concrete terms.
• Send it to the attorney early; court filings have deadlines.

See the full character reference letter for immigration sample.

Visitor visa invitation letters

Many people write a support or invitation letter so a parent or friend abroad can visit on a B-2 visitor visa. Before you spend time on it, know this: the U.S. Department of State says a letter of invitation or affidavit of support is not needed to apply for a visitor visa and is not one of the factors used to decide the case. Applicants qualify based on their own circumstances and ties to their home country, not on assurances from people in the U.S.

If your relative still wants to bring one to the interview, keep it short and factual: who you are, your status in the U.S., the purpose and dates of the visit, where they will stay, and who pays for what.

How to sign: notarized or “under penalty of perjury”?

USCIS forms describe third-party affidavits as “sworn to or affirmed.” Under 28 U.S.C. § 1746, a written statement signed and dated “under penalty of perjury” can generally stand in for a sworn affidavit in federal matters. Notarization is the traditional alternative and removes any doubt. If an attorney is handling the case, follow their preference. Details in our notarization guide.