W-7 Form Mailing Address: Where to Send It (2026)

What Is the USPS Mailing Address for Form W-7?

US Postal Service mail goes to the IRS-designated post office box in Austin, Texas.

Use USPS Priority Mail or Priority Mail Express with tracking. The IRS does not provide proof of delivery; tracking from the carrier is the only confirmation. Allow 3 to 7 business days for USPS transit within the United States; 1 to 3 weeks for international USPS service.

What Is the Courier Street Address for Form W-7?

Private couriers (FedEx, UPS, DHL) cannot deliver to a USPS P.O. Box. Use the IRS street address with the Mail Stop code in the address block.

Include the Mail Stop code on the package label so the courier hands the package to the ITIN Operation directly rather than to a general IRS receiving dock. Use a tracked, signature-required service for any package containing original passports or identity documents.

How Does the W-7 Mailing Address Differ for International Applicants?

The mailing address is the same. International applicants ship to Austin, Texas, regardless of country of origin. Two practical differences apply.

• Transit time: add 1 to 3 weeks each way for international mail; tracked courier services average 5-10 business days.
• Customs declaration:declare contents as “official tax documents, no commercial value.” Original passports should ship inside a sealed envelope with additional document-only declaration to avoid customs inspection delays.

For non-US applicants, working with a Certifying Acceptance Agent avoids shipping the original passport across borders.

What Should the W-7 Mailing Package Contain?

Three components ship together inside one package. Missing any one triggers a CP566 rejection.

1. Form W-7 printed, signed in wet ink, on the current revision (October 2024 or later). See the Form W-7 Guide for line-by-line direction.
2. Federal tax return (Form 1040 or 1040-NR), if required. Most applicants attach one. The 5 IRS exceptions waive the attached-return requirement.
3. Identity and foreign-status documents. Originals or issuer-certified copies. Passport is the only standalone document.

How Can You Avoid Mailing the W-7 Form at All?

Two alternative channels skip the mail entirely and keep the applicant's passport in hand the whole time.

• Certifying Acceptance Agent (CAA).A CAA verifies identity documents locally and submits the Form W-7 packet to the IRS on the applicant's behalf. The passport never leaves the holder. This is the standard route for non-US applicants. Skip the mail with a Certifying Acceptance Agent.
• IRS Taxpayer Assistance Center (TAC). 13 designated TAC locations accept Form W-7 in person and verify documents same-day. Appointment required. Suitable for applicants physically inside the United States.