A Certifying Acceptance Agent verifies your passport and sends the IRS a certificate of accuracy instead — so you get an ITIN without mailing your passport to Texas and living without it for 7–11 weeks. For a non-resident who needs that passport for travel, banking, or daily life in the meantime, that difference is the entire reason the CAA route exists. (Not sure you need an ITIN at all? Start with the ITIN-vs-EIN guide — most LLC owners don't, until a trigger like Form 1040-NR appears.)
Key facts
- A Certifying Acceptance Agent (CAA) is authorized by the IRS to verify ITIN applicants' identity documents so the originals never have to leave the applicant's hands (IRS: ITIN Acceptance Agent Program).
- Standard ITIN processing runs roughly 7–11 weeks after the IRS receives a complete Form W-7 application, longer during the January–April filing season (IRS: Instructions for Form W-7).
- A CAA's identity-verification interview can be conducted by video, but the agent must have the applicant's original document, or a certified copy from the issuing agency, physically in hand during that interview (IRS: ITIN Acceptance Agent Program).
- Without a CAA, the standard path mails an original passport, or an IRS-accepted certified copy, to the IRS's Austin, Texas ITIN unit for the entire processing window (IRS: Instructions for Form W-7).
- An ITIN not used on at least one federal tax return for three consecutive years expires and must be renewed with a new Form W-7 before it can be used again (IRS: Individual Taxpayer Identification Number).
CAA vs. Acceptance Agent vs. DIY-by-mail
"Acceptance Agent" and "Certifying Acceptance Agent" get used interchangeably, but the distinction is the whole point:
| Certifying Acceptance Agent (CAA) | Acceptance Agent (AA) | DIY by mail | |
|---|---|---|---|
| Verifies your documents itself | Yes — authenticates most identity documents directly | No — reviews the application for completeness only | No third party involved |
| Where your original passport goes | Stays with you; the CAA submits a Certificate of Accuracy instead | Mailed to the IRS (original or certified copy) | Mailed to the IRS (original or certified copy) |
| Who provides it | Individuals and firms specifically authorized by the IRS for document authentication | Individuals and firms authorized to help prepare the application, narrower authority than a CAA | You, unassisted |
| Typical cost | Set by the CAA or firm; often bundled with return preparation | Set by the AA or firm | $0 beyond mailing or courier costs |
| Best fit | Applicants who don't want to be without their passport for weeks — especially anyone outside the US | Applicants comfortable mailing original documents but who want help with the form itself | Applicants comfortable being without their passport, or able to get a certified copy from their home country's passport office |
The IRS maintains this authorization directly — a firm can't call itself a CAA without going through the program's application, training, and compliance review (IRS: ITIN Acceptance Agent Program).
The CAA appointment: what actually happens
- You schedule a document-review appointment with the CAA — in person, or by video if the CAA offers it (more on that below).
- You present your passport and any other documents the specific application requires — a US mailing address, a foreign tax ID, or supporting exception documentation, depending on why you're applying.
- The CAA examines and authenticates the document, confirming it's genuine and matches the applicant's information.
- The CAA completes a Certificate of Accuracy (COA) attached to your Form W-7, certifying they've reviewed the original.
- The package — W-7, COA, and the tax return the application is attached to, where one is required — goes to the IRS. Your passport goes back in your pocket, not into an envelope addressed to Texas.
Documents a CAA can certify (and dependent-applicant limits)
For a primary or secondary applicant (you or your spouse), a CAA can generally authenticate most documents on the IRS's accepted list — the passport is the simplest case, since it proves both identity and foreign status on its own.
Dependents are more restricted. A CAA can authenticate a dependent's passport or civil birth certificate directly — but other supporting documents, like school or medical records for a child without a passport, still have to go to the IRS directly, even when a CAA handles the rest of the application. Don't assume "the CAA is handling it" means every family member's documents stay local; confirm the plan per person.
Realistic timeline expectations
A CAA changes whose hands your passport sits in, not how fast the IRS processes the application. Once the completed W-7 package reaches the IRS, it's in the same queue as every other application — typically 7–11 weeks, stretching toward 14 weeks at the peak of filing season. What a CAA actually saves is the mailing and passport-replacement risk, plus often a faster local turnaround for the verification step than scheduling at an IRS Taxpayer Assistance Center.
Cost ranges and what's typically included
Getting the ITIN itself costs nothing — the IRS doesn't charge a fee for issuing one. What you're paying a CAA for is the verification service and application preparation, and that fee — set by the CAA or firm, not the IRS — varies by provider and how the engagement is bundled. As a general range, standalone CAA verification commonly runs in the low hundreds of dollars, often less when bundled into a broader engagement, like the Form 1040-NR preparation the application is usually attached to. What's typically included: the document review and authentication, completion of the Certificate of Accuracy, and preparation of the Form W-7 itself. What's sometimes separate: the tax return preparation the application is attached to, courier costs if documents need to travel to the CAA, and translation of foreign-language supporting documents.
Frequently asked questions
Is a remote or video CAA appointment possible? Yes, but with an important caveat: the IRS allows a Certifying Acceptance Agent to conduct the required identity-verification interview by video instead of in person, but the agent must still have the applicant's original passport, or a certified copy from the issuing agency, physically in hand during that interview. In practice this usually means courier-ing the document to the CAA ahead of the call rather than simply holding it up to a webcam, so a remote appointment removes the need to travel to an office but does not remove the document from the process entirely. Confirm the exact logistics with your specific CAA before assuming a fully hands-off process.
What are the most common reasons a CAA-submitted ITIN application gets rejected? The recurring causes are a missing or incomplete Certificate of Accuracy attachment, a Form W-7 filed without the tax return that creates the need for it when no exception applies, a name that doesn't match exactly between the passport and the return, an expired identification document, and illegible copies of supporting paperwork. A CAA catches most of these before submission, which is a meaningful part of what the fee is paying for — but the application can still be rejected if the underlying documentation itself has a problem the agent can't fix.
Do ITINs need to be renewed? Yes. An ITIN that isn't used on at least one federal tax return for three consecutive years expires automatically and has to be renewed with a new Form W-7 before it can be used again. Renewal uses the same CAA process as a first-time application, including the passport-verification step.
Can family members apply for ITINs together? Generally yes — a spouse and dependents claimed on the same tax return can have their Forms W-7 prepared and submitted in the same package as the primary applicant. The document-certification rules differ by applicant type, though: a CAA can typically authenticate a dependent's passport or civil birth certificate directly, but other supporting documents for a dependent, such as school or medical records used when a passport isn't available, generally still have to go to the IRS directly rather than being certified locally. Confirm each family member's specific document plan with the CAA in advance rather than assuming one process fits everyone in the household.
Written by Ifetoluwase Samuel Pirisola, Managing Director of Caldwell Tax Services, LLC — July 2026. General information, not tax advice for your specific situation — ITIN logistics are easy to get wrong from outside the US. Start your intake if you want help lining up a CAA appointment before you mail anything to the IRS.
Sources: IRS: ITIN Acceptance Agent Program · IRS: Instructions for Form W-7 · IRS: Individual Taxpayer Identification Number · Glossary