New Hampshire
IRS Form 6166 Apostille in New Hampshire
How New Hampshire residents get their IRS Form 6166 authenticated for use abroad — which office handles it, what the New Hampshire Secretary of State can and can’t do, timing and price.
Quick answer
There is no federal apostille office in New Hampshire. Federal documents like your IRS Form 6166 are authenticated only by the U.S. Department of State in Washington, D.C. — the New Hampshire Secretary of State can’t apostille them. We handle the Washington submission; you send the document by mail.
Key takeaways
- Issued by Internal Revenue Service; apostilled only by the U.S. Department of State — the New Hampshire Secretary of State can’t apostille it.
- Through us: $299 all-in for Hague countries (10–12 business days) or $399 with embassy legalization for non-Hague countries (15–17 business days).
- Do it yourself: Form DS-4194 and a $20 fee per document — processed within 5 weeks by mail, or 7 business days if you drop it off in Washington, D.C.
- Authenticated by
- U.S. Department of State
- New Hampshire apostille office
- New Hampshire Secretary of State, Concord
- Our nearest office
- Boston
- Price
- $299 per document, government fees included
Why living in New Hampshire doesn’t change the route
This document is issued by Internal Revenue Service, a federal authority. Federal documents are authenticated only by the U.S. Department of State in Washington, D.C. — the New Hampshire Secretary of State in Concord has no authority over them, and a state apostille on a federal document will be rejected abroad.
So the process for New Hampshire residents is the same as for anyone else in the country: get the document to us, we hand-deliver it in Washington, and it comes back ready to use.
About the IRS Form 6166
How to apostille IRS Form 6166, the U.S. tax-residency certification used for tax-treaty benefits and accounts abroad.
What the New Hampshire Secretary of State can do
The New Hampshire Secretary of State in Concord issues apostilles for documents signed by New Hampshire officials — birth, death and marriage certificates from New Hampshire registrars, New Hampshire state-court records, and documents notarized by New Hampshire notaries. It has no authority over federal documents such as FBI reports, USCIS certificates or IRS letters.
State offices set their own procedures and fees, so confirm current requirements with the office before submitting a state document.
Getting it done from New Hampshire
We serve New Hampshire by mail from our Washington, D.C. headquarters, close to the Office of Authentications; our nearest office to New Hampshire is Boston. There’s no need to visit an office in person.
| Destination | Route | Our turnaround |
|---|---|---|
| Hague Convention country | U.S. Department of State apostille | 10–12 business days |
| Non-Hague country | Authentication + embassy legalization | 15–17 business days |
Serving Manchester, Nashua, Concord and everywhere else in New Hampshire.
Official sources: IRS — Form 8802 & Form 6166 · U.S. Department of State — Authenticate Your Document · New Hampshire Secretary of State — Apostilles & Authentications · HCCH — Apostille Convention status table (Hague countries).
New Hampshire state documents (birth, marriage, state court, notarized) are apostilled by the New Hampshire Secretary of State's Office · Room 204, State House, 107 North Main Street, Concord, NH 03301 · state fee $10. We don’t provide state-level apostilles. Official page (checked October 2026).
How long does the IRS Form 6166 apostille take from New Hampshire?
The U.S. Department of State is the only office that issues a federal apostille. Mailed in yourself, it is processed within 5 weeks of receipt; dropped off in person in Washington, D.C., within 7 business days. Through us it takes 10–12 business days, or 15–17 business days for a non-Hague country that also needs embassy legalization.
| Route | How | Processing time | Cost |
|---|---|---|---|
| Mail it yourself | Form DS-4194 + check to the Office of Authentications, Sterling, VA | Within 5 weeks of receipt | $20 per document + shipping |
| Drop it off yourself | 600 19th Street NW, Washington, D.C. — Mon–Thu, 7:30–9:00 AM, no appointment | Within 7 business days | $20 per document + travel |
| Emergency appointment | Only for a life-or-death family emergency with travel within 2 weeks | Same day | $20 per document |
| Through Federal Apostille USA | We review it, drop it off in D.C. and return it to you with tracking | 10–12 business days total | $299 all-in ($399 non-Hague) |
What does it cost from New Hampshire?
The government fee is $20 per document, paid with Form DS-4194. Our all-in price is $299 per document, covering the government fee, review, D.C. drop-off and U.S. return shipping; non-Hague destinations are $399 with embassy legalization.
Government figures: U.S. Department of State — Request Authentication Services (checked October 2026).
IRS Form 6166 in New Hampshire — FAQ
Can the New Hampshire Secretary of State apostille my IRS Form 6166?
No. This is a federal document, so only the U.S. Department of State can authenticate it. A state apostille on it would be rejected abroad.
Do I have to travel to Washington, D.C. from New Hampshire?
No. We handle the Washington submission for you. Most New Hampshire clients send their documents by mail and receive them back by tracked courier.
How long does it take from New Hampshire?
About 10–12 business days for Hague Convention countries and 15–17 for non-Hague countries including embassy legalization, plus shipping.
How much does it cost?
$299 per document for Hague countries, with government fees and U.S. shipping included; non-Hague destinations are $399 including embassy legalization.
Related: IRS Form 6166 — full guide · All documents in New Hampshire · Federal vs. state apostille
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Order online in minutes, or call and we will walk you through it. Federal documents from anywhere in the U.S. — one flat price, all government fees included.