Updated
ITIN Application Rejected: Reasons and How to Fix It (2026)
What Is a CP566 Notice From the IRS in 2026?
The CP566 is the IRS's standard rejection notice for an ITIN application. The notice arrives by mail 6 to 10 weeks after the original Form W-7 was received. It identifies the rejection cause in plain language and lists the corrections needed for resubmission. The CP566 also tells the applicant whether the attached tax return was processed separately or returned with the packet.
What Are the 6 Most Common Reasons for ITIN Rejection?
- Missing signature on Form W-7. The applicant or, for dependents under age 18, a parent/court-appointed guardian must sign in wet ink. Unsigned forms are auto-rejected.
- Wrong reason code on line 6. The IRS expects specific supporting documents for each reason code (a through h). A mismatch triggers rejection.
- Uncertified document copies. Photocopies, scans, and notarized copies are not accepted. The IRS requires originals or issuer-certified copies.
- Missing or mismatched federal tax return. Without an attached Form 1040 or 1040-NR (and unless an exception applies), the packet is rejected.
- Expired passport or missing photo/signature page. Passports must be current and complete; if pages are missing, the IRS treats the document as invalid.
- Name or date-of-birth mismatch. Spelling variations or date discrepancies between Form W-7 and the passport trigger automatic rejection.
For per-line W-7 guidance that prevents these errors, see the Form W-7 Instructions.
How Do You Fix Each Common ITIN Rejection Reason?
| Rejection Cause | Fix |
|---|---|
| Missing signature | Print fresh Form W-7, sign in black wet ink, refile |
| Wrong reason code | Re-evaluate eligibility, pick correct line 6 code, attach matching documents |
| Uncertified document copies | Obtain issuer-certified copies or work with a CAA to verify originals locally |
| Missing tax return | Attach Form 1040 or 1040-NR, or claim a documented IRS exception (1-5) |
| Expired passport | Renew passport first, then refile with the new document |
| Name or DOB mismatch | Match Form W-7 to passport exactly; include name-change documents if applicable |
How Do You Resubmit an Application After a CP566 Rejection?
- Read the CP566 notice carefully. The IRS identifies the exact field or document at fault.
- Gather corrected materials. Replacement documents, updated forms, fresh tax return if needed.
- Prepare a clean Form W-7. Do not annotate the old form; print a fresh copy on the current revision (October 2024 or later).
- Choose a stronger submission channel. A Certifying Acceptance Agent (CAA) pre-checks the packet and prevents repeat rejection.
- Mail the corrected packet to the IRS ITIN Operation in Austin, TX or submit through the CAA.
For applicants who want a verified packet from the start, see the Certifying Acceptance Agent page.
How Long Does Resubmission Take After Rejection?
Resubmission restarts the standard 7 to 11 week IRS processing window. The clock starts over from the date the IRS receives the corrected packet. Add 1 to 3 weeks for international mail transit. Resubmissions during peak season (January-April) follow the longer 9 to 13+ week timeline.
For week-by-week timing, see the processing time guide and the application status page.
How Do You Prevent ITIN Rejection in the First Place?
- Use the current Form W-7 revision. October 2024 or later as of 2026.
- Verify name spelling and date of birth match the passport exactly, character by character.
- Pick the correct reason code on line 6 and attach the supporting documents that code requires.
- Work with a Certifying Acceptance Agent. CAAs pre-check Form W-7 and verify documents on-site; rejection rates drop sharply.
- Sign in wet ink. No digital signatures, no missing signature blocks.
Frequently Asked Questions About ITIN Application Rejection
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