Seattle, WA
IRS Form 6166 Apostille in Seattle, WA
How Seattle residents get their IRS Form 6166 authenticated for use abroad — which office handles it, the local details, timing and price.
Quick answer
There’s no federal apostille office in Seattle. Federal documents like your IRS Form 6166 are authenticated only by the U.S. Department of State in Washington, D.C. We handle that submission; you send the document by mail.
Key takeaways
- Issued by Internal Revenue Service; apostilled only by the U.S. Department of State in Washington, D.C.
- 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.
- County
- King County
- Federal court
- U.S. District Court for the Western District of Washington
- State apostille office
- Washington Secretary of State, Olympia
- Our nearest office
- Seattle
Why living in Washington 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 Washington Secretary of State in Olympia has no authority over them, and a state apostille on a federal document will be rejected abroad.
So the process for Washington 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.
Seattle: the local details
Seattle is in King County, within the U.S. District Court for the Western District of Washington. Washington state documents are apostilled by the Washington Secretary of State in Olympia.
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.
Getting it done from Seattle
Our Seattle office handles Seattle orders by phone and online. It’s a processing office and isn’t open to the public, so documents come to us by mail.
| 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 |
Official sources: IRS — Form 8802 & Form 6166 · U.S. Department of State — Authenticate Your Document · Washington Secretary of State — Apostilles & Authentications · HCCH — Apostille Convention status table (Hague countries) · U.S. Courts — Federal Court Websites.
Washington state documents (birth, marriage, state court, notarized) are apostilled by the Washington Secretary of State, Corporations & Charities Division · 960 Washington St, Cheney, WA 99004 · (360) 725-0377 · state fee $15. We don’t provide state-level apostilles. Official page (checked October 2026).
How long does the IRS Form 6166 apostille take from Seattle?
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 in Seattle?
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 Seattle — FAQ
Is there an apostille office in Seattle for a IRS Form 6166?
No. The only office that can authenticate this document is the U.S. Department of State in Washington, D.C. We handle that submission for Seattle clients by mail.
Do I need to visit an office in Seattle?
No. Our Seattle office isn’t open to the public — Seattle clients order online or by phone, send documents by mail and receive them back by tracked courier.
How long does it take from Seattle?
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.
Which federal court covers Seattle?
Seattle is in King County, within the U.S. District Court for the Western District of Washington.
Related: All documents in Seattle · IRS Form 6166 in Washington · IRS Form 6166 — full guide
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