IRS Form 6166 · Nigeria
IRS Form 6166 Legalization for Nigeria
Route, timeline, translation and price for using a IRS Form 6166 in Nigeria — based on the official Hague Convention status table.
Quick answer
Nigeria requires embassy legalization. Your IRS Form 6166 needs U.S. Department of State authentication, then Nigeria embassy legalization — 15–17 business days with us, both steps included. No translation required; legalization via embassy.
- Route
- Authentication + embassy legalization
- Hague member since
- Not a member
- Issuing authority
- Internal Revenue Service
- Translation
- No translation required; legalization via embassy.
Is Nigeria a Hague Convention country?
No. Nigeria is not a party to the Apostille Convention, so an apostille will not be accepted there. The document needs U.S. Department of State authentication first, then legalization at the Nigeria embassy or consulate — in that order.
The route to Nigeria
A IRS Form 6166 is issued by Internal Revenue Service, a federal authority, so it is authenticated by the U.S. Department of State in Washington, D.C. — never by a state office. For Nigeria, the Department of State’s authentication is then legalized at the Nigeria embassy or consulate.
People most often send documents to Nigeria for employment, education, business. Receiving offices set their own requirements, so confirm what yours asks for — we’ll help you read it.
About the IRS Form 6166
How to apostille IRS Form 6166, the U.S.
You obtain this from Internal Revenue Service. We can’t request it on your behalf, but once you have it, we handle everything through to delivery in Nigeria.
Timeline and price
| Stage | Time | Notes |
|---|---|---|
| Department of State authentication + embassy legalization | 15–17 business days | Both steps included; the Nigeria embassy step cannot come first |
| Certified translation | Alongside | Ordered with the authentication so nothing waits in sequence |
| Return shipping | 1–3 days in the U.S. | Tracked courier; worldwide delivery available |
Price: $399 per document, government fees and U.S. shipping included, embassy legalization included.
Translation for Nigeria
No translation required; legalization via embassy. We coordinate certified translation alongside the authentication so the document arrives ready to file.
How it works
Confirm the route
Tell us you’re sending a IRS Form 6166 to Nigeria. We confirm route, price and timing before any payment.
Get the document to us
Ship it to our processing office, or to any of our U.S. offices and we route it internally.
Pre-submission review
We check it against authentication requirements to catch the problems that cause rejections.
Department of State
Hand-delivered to the Office of Authentications in Washington, D.C.
Nigeria embassy legalization
The authenticated document is presented to the Nigeria embassy or consulate.
Certified translation
Arranged alongside so it arrives ready to file in Nigeria.
Delivery
Returned to you by tracked courier, or sent directly to your recipient in Nigeria.
Sources: HCCH — Apostille Convention status table (updated 30 June 2026) · U.S. Department of State — Authenticate Your Document.
IRS Form 6166 for Nigeria — FAQ
Is Nigeria part of the Hague Apostille Convention?
No. Nigeria is not a party to the Convention, so documents need Department of State authentication followed by Nigeria embassy legalization.
How long does it take to prepare a IRS Form 6166 for Nigeria?
About 15–17 business days for Department of State authentication plus Nigeria embassy legalization, both included. Certified translation runs alongside.
How much does it cost to send a IRS Form 6166 to Nigeria?
$399 per document, with government fees and U.S. shipping included. The embassy legalization step is included. We confirm your exact price before any payment.
Do I need a translation for Nigeria?
No translation required; legalization via embassy. We can arrange certified translation with your order.
Can you obtain the IRS Form 6166 for me?
No — you obtain it from Internal Revenue Service first. Once you have it, we handle the rest.
Do I have to be in the United States?
No. Most Nigeria orders are handled entirely by mail, and we can ship the finished document anywhere.
Related: IRS Form 6166 — full guide · All documents for Nigeria · Apostille vs. embassy legalization · Why apostilles get rejected
Ready to start?
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.