One of the most common reasons ITIN applications get delayed or rejected is incorrect documentation.
If you are applying for an Individual Taxpayer Identification Number (ITIN), understanding which identity documents the IRS accepts is critical. Even small document mistakes can lead to processing delays, IRS notices, or rejected Form W-7 applications.
At ITIN, we help non-U.S. residents, foreign business owners, freelancers, dependents, and investors navigate the ITIN application process correctly and avoid common filing problems.
This guide explains:
- What documents the IRS accepts for an ITIN application
- Which documents work best
- Whether you need to mail your passport
- Common document mistakes that lead to rejection
What Is an ITIN?
An ITIN (Individual Taxpayer Identification Number) is a tax processing number issued by the IRS to individuals who:
- Need to file U.S. taxes
- Are not eligible for a Social Security Number (SSN)
To apply, applicants generally submit:
- W-7 del IRS
- Supporting identity documents
- A federal tax return (unless an exception applies)
What Documents Does the IRS Accept for an ITIN Application?
The IRS accepts certain documents to prove:
- Identity
- Foreign status
The IRS currently recognizes multiple document types, but some are stronger than others.
The Best Document for an ITIN Application: Passport
A valid passport is generally the preferred document for an ITIN application because it proves both:
- Identity
- Foreign status
For most applicants, a passport alone is sufficient.
However, the passport must:
- Be valid (not expired)
- Be clear and legible
- Match the information on Form W-7
Other Documents the IRS May Accept
If you do not submit a passport, the IRS may require a combination of documents.
Accepted documents may include:
- National identification card
- Visa estadounidense
- Foreign voter registration card
- Civil birth certificate
- Foreign driver’s license
- U.S. driver’s license
- Military identification card
- State identification card
- Medical records (for dependents under certain ages)
- School records (for dependents and students)
Each document must meet IRS standards and usually must include:
- A photo
- Name
- Current validity date
- Address or identifying information
Do You Need to Mail Original Documents?
In many cases, yes.
The IRS generally requires:
- Original documents
OR - Certified copies from the issuing agency
Regular notarized copies are usually NOT accepted.
Because mailing original passports can feel risky, many applicants work with a Certifying Acceptance Agent (CAA).
What Is a Certifying Acceptance Agent (CAA)?
A Certifying Acceptance Agent is authorized by the IRS to:
- Verify identity documents
- Certify certain passport copies
- Help applicants avoid mailing original passports
Using a CAA may:
- Reduce rejection risks
- Simplify document verification
- Make the process safer and more convenient
Common Document Mistakes That Lead to ITIN Rejection
The IRS rejects many applications because of document-related issues.
Common problems include:
- Expired passports
- Unclear copies
- Missing pages
- Incorrect translations
- Names that do not match tax returns
- Uncertified copies
- Missing foreign status proof
Even small inconsistencies can trigger:
- IRS notices
- Delays
- Requests for additional evidence
- Rejected Form W-7 applications
Do Dependents Need Different Documents?
Yes, sometimes.
Dependents applying for an ITIN may need additional documentation depending on:
- Age
- Country of residence
- Relationship to the taxpayer
For example:
- School records may be required for dependents over certain ages
- Medical records may be accepted for younger children
The IRS has become increasingly strict about dependent ITIN applications in recent years.
Can Expired Documents Be Used?
Generally, no.
The IRS usually requires:
- Current
- Valid
- Unexpired
documents.
Expired passports are one of the most common reasons ITIN applications are rejected or delayed.
Translation Requirements for Foreign Documents
If documents are not in English, certified translations may sometimes be necessary.
Incomplete or unofficial translations can create additional processing issues.
How to Improve Your Chances of ITIN Approval
To reduce the risk of rejection:
- Use a valid passport whenever possible
- Ensure all documents are clear and complete
- Double-check consistency across forms
- Submit certified copies if required
- Carefully prepare Form W-7
- Consider using a Certifying Acceptance Agent
Strong document preparation is one of the most important parts of the ITIN application process.
How ITIN Can Help
At ITIN, we help applicants:
- Understand IRS document requirements
- Prepare Form W-7 correctly
- Avoid common ITIN application mistakes
- Navigate identity verification rules
- Apply for ITINs safely and efficiently
If you are preparing your first ITIN application or want to avoid document-related delays, professional guidance can make the process much smoother.
