What Is a Certified Acceptance Agent, and What Do They Actually Do?

A Certified Acceptance Agent (CAA) is a person or business authorized by the IRS Acceptance Agent Program to help foreign individuals apply for an ITIN. A CAA does much more than "certify a passport" — they help prepare and review the entire application, authenticate identity documents under IRS procedures, and formally certify to the IRS that they've done so.

That distinction matters because an ITIN application isn't just an identity check. The applicant needs the correct tax reason, the right Form W-7 selections, acceptable supporting documents, and, in most cases, an accurate U.S. tax return — all of it has to hold together.

A CAA Does More Than Verify Your Passport

Many people contact ITIN Abroad believing they already have everything prepared and simply need a CAA to "certify" their passport. That isn't how the process works.

Before an ITIN application can be submitted correctly, questions may include:

• Do you actually qualify for an ITIN?

• Are you eligible for a Social Security Number instead?

• What is the correct reason to select on Form W-7?

• Does your application require a U.S. tax return?

• If you're applying without a tax return, do you qualify for an IRS-approved exception?

• Are the supporting documents correct for that exception?

• Is the attached tax return accurate?

• Do your identity documents meet IRS requirements?

The CAA process should begin long before anyone looks at a passport.

Lucie came to me with a completed Form W-7 and said she just needed her passport certified. As her CAA, I would be signing that W-7 myself — so I don't work from a form someone else has already filled out. I prepare it from scratch. When I reviewed her self-prepared W-7, I found several errors. This is exactly why having a CAA prepare your documents matters — catching mistakes like these before submission is what avoids a rejection later.

There was also the identity-verification piece to work out. Because I need physical possession of an applicant's passport — either the original or a certified copy from the issuing agency — to complete the CAA verification, and Lucie didn't want to mail her original passport to me, she went to the U.S. Embassy instead and had them issue a certified copy of her passport. Once she had that certified copy and the corrected W-7, she sent everything to me, and I added my CAA verification before submitting the application to the IRS.

Lucie was relieved she'd reached out before submitting on her own. What she thought was a quick passport certification turned into corrections that would have gotten her application rejected — caught and fixed before it ever reached the IRS.

What Does a CAA Do With My Identity Documents?

The IRS requires ITIN applicants to prove both identity and foreign status. A passport can generally establish both; applicants using other documents may need more than one.

CAAs receive additional, IRS-required forensic document training designed to help them recognize fraudulent identity documents and evaluate the originals presented during the ITIN process. That training includes learning to examine the features used to determine whether a document appears authentic. This is why a CAA can't simply receive an ordinary photocopy of a passport and certify it — the purpose is to verify the actual document and confirm the person applying is the document holder.

Once the applicable documents have been authenticated, the CAA formally certifies to the IRS that this review took place and submits copies of the documents along with that certification — rather than requiring you to mail your original passport to the IRS in most situations.

There are real limits to this, especially for dependents. A CAA can authenticate a passport and civil birth certificate for a dependent, but any other supporting document for a dependent — medical records, school records, and so on — still has to go directly to the IRS as an original or certified copy. CAAs also can't authenticate foreign military identification cards; those, too, go directly to the IRS.

One more practical detail worth knowing: the IRS requires AAs and CAAs to conduct an interview with every applicant — primary, secondary, and dependent — either in person or by video conference. During that interview, the CAA needs to have your original document or a certified copy from the issuing agency (such as an embassy-certified passport copy) physically in hand — not just a photocopy you've scanned and emailed over.

Why Does Identity Verification Matter So Much?

Foreign applicants often assume that a notarized or apostilled passport copy will automatically satisfy the IRS. It may not. The IRS has its own specific requirements for ITIN supporting documents, and a CAA has to follow the IRS's own authentication process before certifying anything.

For applicants living outside the United States, obtaining acceptable documents can be one of the more frustrating parts of the whole process. At ITIN Abroad, we explain the appropriate process based on your location and documents before the application is submitted.

What Does a CAA Review Besides Identity?

A properly handled ITIN application has several pieces that must agree with each other.

Depending on the situation, the CAA may need to review:

Your reason for applying

The IRS only issues an ITIN when there's a current federal tax purpose. Simply wanting an ITIN because a bank, platform, or other company has asked for one doesn't automatically mean the IRS will issue it.

Form W-7

The reason selected on Form W-7 must match your circumstances and supporting documentation.

The U.S. tax return

Most ITIN applications include a U.S. federal tax return unless the applicant qualifies for an exception. A correctly prepared Form W-7 can still fail if the attached return doesn't properly support the application.

Exception documentation

Applicants who qualify to apply without a tax return may need very specific supporting documents. A letter that seems sufficient to the applicant, or even to the financial institution that wrote it, may still fail to meet IRS requirements.

Identity and foreign-status documents

The documents themselves must be acceptable, current, and handled according to IRS procedures.

All of these pieces have to work together.

Acceptance Agent vs. Certified Acceptance Agent

These terms sound similar, but they aren't identical.

An Acceptance Agent (AA) is authorized to assist applicants with the ITIN process, review necessary documentation, and forward completed Forms W-7 to the IRS.

A Certifying Acceptance Agent (CAA) has additional authority to authenticate most qualifying identity documents and formally certify to the IRS that they've done so.

For an international applicant, that additional authority can be very valuable, since sending an original passport to the IRS may be impractical or undesirable.

Is a CAA the Same as an Enrolled Agent?

No. These are two completely different qualifications.

A CAA is authorized through the IRS Acceptance Agent Program to assist with ITIN applications and, when certified, authenticate qualifying identity documents.

An Enrolled Agent (EA) is a federally authorized tax practitioner who can represent taxpayers before the IRS and whose credential relates to U.S. taxation broadly.

A person can be a CAA without being an Enrolled Agent. That distinction matters because many ITIN applications also involve a U.S. tax return, withholding issue, treaty position, business filing, real-estate transaction, or another tax matter entirely.

ITIN Abroad is led by someone who is both an Enrolled Agent and a Certified Acceptance Agent, allowing the ITIN application and the underlying U.S. tax issues to be considered together. (We'll look at why that combination matters in "Why Work With an Enrolled Agent Who Is Also a CAA?".)

Why Tax Return Preparation Became Part of the Job

To appear on the IRS's own published list of Acceptance Agents, a business has to confirm it performs tax return preparation. This is a real requirement, and it wasn't always this way. When I first became a CAA in 2019, offering tax preparation wasn't required — ITIN Abroad actually started as a separate entity that only handled ITIN applications and didn't prepare tax returns at all.

That shift makes sense given what a CAA is already required to do. Before certifying anything, a CAA has to confirm the applicant actually has a current, valid tax reason for the ITIN — and if that reason requires a return, someone has to prepare it accurately for the whole application to hold together. Requiring the CAA's business to offer tax preparation as part of its practice, rather than being purely a document-certification operation, keeps the ITIN process connected to real tax expertise instead of being handled in isolation.

To be clear, this is a requirement on the CAA's business, not a requirement that every client use ITIN Abroad specifically for their tax return. If you already have a return prepared elsewhere, we can still handle your ITIN application and CAA certification — we'll just review that return as part of making sure the full package is accurate and consistent, the same as we would with any supporting document.

It's also created a real barrier for CAAs based outside the United States. Preparing a U.S. tax return correctly requires ongoing, current knowledge of U.S. tax law — treaty positions, filing status rules, income sourcing, and more — which is a different skill set from document authentication. That's harder to maintain from abroad without a broader U.S. tax practice behind it, which is part of why the pool of foreign-based CAAs who can genuinely support the full process is smaller than it might first appear.

Why Isn't a CAA Just a Document-Certification Service?

Because identity verification is only one piece of the ITIN process. Imagine the passport is perfectly acceptable, but:

• The applicant doesn't currently qualify for an ITIN

• The wrong reason is selected on Form W-7

• An SSN should have been requested instead

• The tax return is prepared incorrectly

• Required exception documentation is missing

• A third-party letter doesn't satisfy the IRS's requirements

  
  

Certifying the passport doesn't fix any of that. That's why ITIN Abroad doesn't offer stand-alone passport certification separate from the full application. The goal is one complete, consistent application — not one certified document sitting next to a package full of other problems.

What Training Does a CAA Have?

The IRS requires new and renewing acceptance agent applicants to complete mandatory ITIN acceptance agent training, and CAAs specifically must complete separate forensic document training before participating in the program. That forensic training is designed to build the skills needed to authenticate original identification documents and spot signs a document may not be genuine.

CAAs also enter into a formal agreement with the IRS governing their participation in the Acceptance Agent Program, and are subject to periodic IRS compliance reviews — including cooperation with the Treasury Inspector General for Tax Administration or the Government Accountability Office if requested. Failure to cooperate can result in termination from the program.

So "CAA" isn't simply a marketing title. It's a specific, IRS-authorized role with defined training, procedures, and ongoing accountability.

What Does ITIN Abroad Do as Your CAA?

When ITIN Abroad handles your application, we look at the entire process. Depending on your engagement, that can include:

• Confirming why you need an ITIN

• Considering whether you may instead be eligible for an SSN

• Preparing Form W-7 from scratch — we don't work from a form you've already filled out, since it's the CAA's own signature going on it

• Determining whether a tax return is required

• Preparing the related tax return when included in your service

• Identifying the supporting documents required for your situation

• Reviewing exception documentation

• Completing the required identity-verification interview and authentication process

• Formally certifying the application to the IRS

• Maintaining copies of the complete application

• Submitting a consistent application package

• Following up during normal IRS processing

  
  

No professional can guarantee how the IRS will process an application. What a CAA can do is make sure the package being submitted has been carefully reviewed before the IRS ever sees it.

FAQ

Does a CAA issue my ITIN?

No. Only the IRS issues an ITIN. A CAA helps prepare, authenticate, and submit the application according to IRS procedures.

Can a CAA guarantee that my application will be approved?

No. A CAA cannot control IRS processing or guarantee approval.

Does a CAA only certify passports?

No. A CAA's role can include completing and reviewing Form W-7, authenticating qualifying identity documents, and helping assemble the complete ITIN application package.

Can I fill out Form W-7 myself and just have a CAA certify my documents?

Not with ITIN Abroad. Because the CAA signs the Form W-7, we prepare it ourselves rather than certifying a form someone else has already completed. This also means we catch errors before submission rather than after.

Can I send a CAA a photocopy of my passport?

No. An ordinary photocopy isn't a substitute for the document-verification requirements a CAA must follow, which include an in-person or video interview with the original document physically in hand.

Does every ITIN applicant need a CAA?

No. Applicants can apply directly with the IRS or use other IRS-authorized options. A CAA is one way to get professional help with the application and identity-verification process.

Is every CAA also a tax professional?

Not necessarily. A CAA credential relates specifically to the IRS Acceptance Agent Program. Other professional tax credentials, such as Enrolled Agent, CPA, or attorney, are separate.

A Certified Acceptance Agent is not simply someone who looks at your passport. A CAA is part of the process of making sure your identity documents, Form W-7, tax reason, and supporting information all come together in one complete ITIN application.