Fax Form 8802 — U.S. residency certification (Form 6166)

Form 8802 can be faxed to 877-824-9110 only if you paid the user fee electronically at pay.gov — check payments must go by mail. From outside the U.S. the fax number is 304-707-9792 (not toll-free).

The result is Form 6166, the residency certificate foreign payers and treaty partners ask for. Apply at least 45 days before you need it.

Fax Form 8802 now — $2.49

Where this form faxes

ScenarioIRS fax number
User fee paid electronically877-824-9110
From abroad304-707-9792 (not toll-free)

IRS fax numbers change without notice. We re-verify our routing table against the current IRS form instructions, and the exact number your document was sent to is printed on your transmission report.

Deadline

Submit at least 45 days before you need Form 6166; certificates for a given year are issued starting December 1 of the prior year.

Frequently asked questions

Yes, to 877-824-9110 — but only when the user fee was paid electronically via pay.gov. If you paid by check, the application must be mailed.

$85 for individual applicants and $185 for non-individual applicants per Form 8802. Pay it on pay.gov before faxing and include the confirmation number.

Plan on 45 days or more. Faxing removes mail time on the front end and gives you a dated proof of submission.

Ready to fax Form 8802?

$2.49 flat up to 25 pages · correct IRS number resolved automatically · transmission report to your email.

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