DNA Testing for Immigration: When It’s Requested, Cost, and Process

DNA testing for immigration is a voluntary option that U.S. Citizenship and Immigration Services (USCIS) or a U.S. consular officer will suggest when the documents you submitted can’t prove a claimed biological family relationship. It’s classed as secondary evidence, used only when primary records like birth certificates are missing, inconsistent, or not persuasive.¹ Nobody can force you to swab, but if you’ve been asked and you refuse without offering something equally convincing, the petition will almost certainly be denied.

When USCIS or a Consulate Suggests a Test

Immigration officers look for primary documentary evidence first. DNA enters the picture only when that evidence falls short, and the request typically arrives in a Request for Evidence (RFE) from USCIS or a similar letter from a consular officer during an immigrant visa interview or Consular Report of Birth Abroad process.²³ In more serious cases, USCIS may issue a Notice of Intent to Deny (NOID) instead, warning that without more evidence the petition is headed for denial.

Three situations tend to trigger the suggestion:

The country of origin has weak civil registration, lost records to conflict, or never issued a birth certificate in the first place.
Names, dates, or other details don’t match across the government records submitted, and the paperwork can’t resolve the discrepancy on its own.
The officer suspects the claimed relationship may not be genuine, and documents alone aren’t enough to clear the doubt.

Voluntary in Name, Not in Effect

Every official source stresses that testing is voluntary. USCIS policy says that a decision not to submit DNA evidence “is not factored into an adjudicative decision,” and the Department of State calls testing “entirely voluntary.”²³

The practical picture is different. If you got an RFE or NOID, the officer has already decided your documents aren’t sufficient. DNA is the only non-documentary method the agency accepts for proving a biological tie. Under certain older blood-test provisions in the regulations, refusal “when requested may constitute a basis for denial of the petition” unless there is a legitimate religious objection.⁴ Declining without a strong alternative is a risky move.

Which Relationships Can Be Tested

Immigration DNA testing covers a narrow set of biological ties: parent-child, full siblings, and half-siblings.³ Each one has its own probability threshold the results must meet.

Parent-Child

This is the most common test. Results must show a 99.5 percent or greater probability of the biological parent-child relationship to be accepted as sufficient evidence.⁵ For stepchild petitions, testing applies only to confirm the biological link with the natural parent who is the petitioner’s spouse.

Full Siblings and Half-Siblings

Sibling and half-sibling results need to reach a 90 percent probability or higher to count as probative evidence.⁶ USCIS set that bar after reviewing the available science, concluding it captures most valid sibling relationships while limiting false matches. Half-sibling tests are inherently less precise because the two people share genetic material from only one parent, but the same 90 percent threshold applies.⁵

Relationships That Won’t Be Tested

Consular officers are specifically told not to recommend DNA testing for cousins, aunts, uncles, nieces, nephews, or other extended relationships, because these tests can’t reliably reach the required probability levels.⁷ Officers are also barred from ordering DNA tests to try to disprove a relationship, such as testing spouses to check whether they are secretly blood relatives.

How Long You Have to Respond

An RFE carries a maximum response window of 12 weeks (84 calendar days), and USCIS officers cannot extend it.⁸ If you’re in the United States, you get 3 extra days for mailing, so the practical deadline is 87 days from the date USCIS mails the notice. RFEs issued by an international field office add 14 mailing days instead of 3.²

A NOID is much tighter: 30 days maximum.⁸ DNA testing takes coordination between a U.S. lab and a sample collection at an overseas embassy, and 30 days can barely be enough. If you think testing is likely in your case, identifying an AABB-accredited lab in advance can save you weeks.

How the Testing Actually Works

All immigration DNA testing must go through a lab accredited by AABB (formerly the American Association of Blood Banks, now the Association for the Advancement of Blood and Biotherapies).⁹ USCIS and the State Department will not accept results from any other source. The sample itself is a cheek swab, not a blood draw.

Because the petitioner and beneficiary usually live in different countries, collection happens in two places. In the United States, the AABB lab schedules the petitioner at an approved facility where an impartial third party takes the swab and documents the chain of custody. Overseas, the lab ships a sealed kit directly to the U.S. Embassy or Consulate, which then contacts the beneficiary to schedule an appointment.³

At the embassy, a designated physician or medical technician collects the sample while consular officers witness the process. The applicant brings a passport, a photograph, and a receipt showing the collection fee has been paid to the panel physician. The sealed kit ships back to the lab in a pre-paid envelope. The kit is never released to the applicant, the technician, or anyone else in between.³ This strict chain of custody is why consumer at-home DNA kits are worthless for an immigration case.

What It Costs

The petitioner pays all costs, and the lab requires payment in advance.³ Pricing depends on the lab, the number of people tested, and where the overseas collection takes place. Expect several hundred dollars for the lab work, plus a separate collection fee charged by the panel physician abroad. Each additional beneficiary adds to the bill. Get a quote from the AABB lab before you commit, and keep in mind that paying for testing does not guarantee approval of the petition.

How Results Reach the Agency

The lab sends the official report directly to USCIS or the U.S. Consulate that requested it. The petitioner and beneficiary do not deliver the results, and reports handed in by an applicant rather than transmitted by the lab may be rejected. The petitioner and beneficiary usually receive their own copies. The officer then reviews the DNA report alongside the rest of the file. A positive result at the required threshold lets the petition move forward, but other eligibility requirements still have to be met.

Negative and Inconclusive Results

A negative result means the tested individuals are not biologically related in the way the petition claimed. In most cases the agency will deny, and further paperwork cannot overcome a definitive genetic mismatch.

An inconclusive result is different. If a parent-child test falls below 99.5 percent without ruling the relationship out, retesting is permitted, with the petitioner paying each round.⁷ If repeated attempts still cannot reach the accepted level, the consular officer returns the petition to USCIS with a memo explaining the situation. Other evidence can still be submitted, but if the DNA does not support the claimed relationship after several rounds, options narrow quickly.

Don’t Test Before You’re Asked

Getting tested proactively, before an official request, tends to backfire. The chain-of-custody procedures are built around a specific requesting agency, and until USCIS or a consulate has identified itself in a written request, the lab cannot follow the correct collection and submission protocol. Results produced outside that framework may not be accepted or may carry less weight. Wait for the RFE, NOID, or consular letter, then move quickly. The deadlines are short and the logistics slow.

1
eCFR. 8 CFR 204.1 – General Information About Immediate Relative and Special Immigrant Petitions
2
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 1 Part E Chapter 6 – Evidence
3
U.S. Department of State. DNA Relationship Testing Procedures
4
eCFR. 8 CFR 204.2 – Petition for Relative, Widow or Widower, or Special Immigrant
5
U.S. Department of State Foreign Affairs Manual. 9 FAM 601.11 – Visas and DNA
6
U.S. Citizenship and Immigration Services. DNA Evidence of Sibling Relationships
7
U.S. Department of State. Update to 9 FAM 601.11 Permitting Direct Sibling-to-Sibling and Half-Sibling DNA Testing as Evidence of Relationship
8
eCFR. 8 CFR 103.2 – Submission and Adjudication of Benefit Requests
9
AABB. AABB-Accredited Relationship (DNA) Testing Facilities