What documents should I include with my W-7 mailing?

Send the signed Form W-7, the federal tax return (Form 1040 or 1040-NR) if applicable, an original passport or issuer-certified copy, and any reason-code supporting documents. Keep photocopies of everything before mailing.

Should I use certified mail or tracking for Form W-7?

Yes. Always use a tracked mailing method — USPS Certified Mail, USPS Priority Mail Express, FedEx Priority, or UPS — so you have proof of IRS receipt. The IRS does not confirm receipt by phone for the first 7 weeks.

Can a CAA mail Form W-7 on my behalf?

Yes. Certifying Acceptance Agents prepare and mail the entire W-7 packet to the IRS on behalf of applicants. This avoids the need to mail original documents and ensures the packet uses the correct address, current Form W-7 revision, and matching supporting documents. At itin-number.com applicants pay $297 flat with full submission handling included.

Updated June 25, 2026

Where to Mail Form W-7 in 2026: Complete Address Guide

Q: What is the street address for FedEx or UPS shipments of W-7?

For private courier services (FedEx, UPS, DHL), ship to: Internal Revenue Service, ITIN Operation, Mail Stop 6090-AUSC, 3651 S Interregional Hwy 35, Austin, TX 78741-0000, USA. PO boxes do not accept courier deliveries.

What Is the Official IRS Mailing Address for Form W-7 in 2026?

USPS mailing address:

Internal Revenue Service
ITIN Operation
P.O. Box 149342
Austin, TX 78714-9342
USA

Private courier (FedEx, UPS, DHL) address:

Internal Revenue Service
ITIN Operation
Mail Stop 6090-AUSC
3651 S Interregional Hwy 35
Austin, TX 78741
USA

For the complete address reference page, see the W-7 form mailing address page.

Why Are There Two Different IRS Mailing Addresses?

USPS delivers to PO boxes; private couriers like FedEx, UPS, and DHL deliver only to street addresses. The IRS therefore lists 2 distinct delivery points for the same ITIN Operation center in Austin, Texas. Both lead to the same processing team but using the wrong address with the wrong carrier results in the package being returned or delayed.

What Should You Include in the W-7 Packet?

Signed Form W-7 (October 2024 revision or later, wet-ink signature).
Federal tax return (Form 1040 or 1040-NR) unless an IRS exception applies.
Original passport or issuer-certified copy.
Reason-code supporting documents per line 6 selection.
IRS-recognized translations for any non-English documents.
Cover sheet (optional but recommended) listing the applicant name, return year, and contact info.

Which Mailing Method Is Best for International Applicants?

FedEx International Priority to the street address: fastest, tracked, signature confirmation.
UPS Worldwide Express to the street address: equivalent speed and tracking.
USPS Priority Mail Express International to the PO box: cheaper, tracked, but slower in customs.
Avoid economy mail: untracked international economy mail can take 4 to 8 weeks and offers no proof of delivery.

How Do You Confirm the IRS Received Your W-7?

Use the carrier's tracking number to confirm physical delivery. The IRS does not send a confirmation receipt. After 7 weeks (9 to 11 during peak season), call 1-800-829-1040 with the tracking number and date of receipt to confirm the packet entered review. A Certifying Acceptance Agent can confirm receipt earlier through ITIN Operations contact channels.

Frequently Asked Questions About Mailing Form W-7

Mail the completed Form W-7 and supporting documents to: Internal Revenue Service, ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342, USA. Use USPS for standard mail. For tracked international mail, use the FedEx/UPS street address instead of the PO box.

Skip the mailing logistics entirely. Apply with a Certifying Acceptance Agent — $297 flat, ready in 7 days.