Guide to becoming a certifying acceptance agent (CAA)

The U.S. tax system can be daunting, especially for foreign individuals who need to file returns but aren’t eligible for a Social Security number. That’s where certifying acceptance agents, or CAAs, step in. These IRS-authorized professionals play a crucial role in helping people obtain an individual taxpayer identification number (ITIN), making tax compliance more accessible for those living, working or investing in the United States. 

The CAA program has a fully electronic application process. The process streamlines reviews, speeds up approvals and strengthens oversight, giving both applicants and the IRS a more secure and efficient system. 

What is a certifying acceptance agent

A CAA is an individual or organization authorized by the IRS to assist foreign nationals and other non-U.S. persons in obtaining an ITIN. Their responsibilities go beyond simply filling out paperwork. CAAs verify identity documents, help applicants complete Form W-7, Application for IRS Individual Taxpayer Identification Number, and communicate directly with the IRS on behalf of the taxpayer. This support is especially valuable for those who must submit original identification documents, items that can be difficult or costly to replace if lost. 

The application process

The IRS’s modernized process is a game-changer for anyone interested in becoming a CAA. What was once a paper-heavy, months-long ordeal now moves through an electronic platform, cutting the estimated processing time in half from 120 days to about 60 days for complete applications. To help applicants navigate the system, the IRS has published a detailed FAQ and a step-by-step tutorial within its e-Services portal.

How to become a CAA 

1. Complete ITIN acceptance agent training: Every responsible party listed on the application must finish this mandatory training. It covers the duties, quality standards and expectations tied to the acceptance agent agreement. 
2. Finish forensic document training: This step, required only for CAAs, teaches the skills needed to review and authenticate identity documents. Because CAAs handle sensitive records, the IRS wants them to spot signs of alteration or inconsistency.
3. Submit the electronic application: Through IRS e-Services, applicants identify principals, partners, owners, and responsible parties for their firm or organization. Everyone listed (except contacts) must register in e-Services, confirm training completion, complete the required fields, and sign electronically. Importantly, applicants should not upload their application through the CAA Document Upload Tool right away, they must wait 24 hours after submission. 
4. Upload supporting documents: Using the CAA Document Upload Tool, applicants provide forensic training certificates, professional credentials, citizenship papers and for nonprofits, exemption letters. 

After approval, the principal or authorized individual can update certain information, such as address or contact details, directly online. Some changes, like adding new responsible parties, require IRS approval. The IRS expects updates within 30 days, and the online tutorial clarifies which updates can be made directly. 

Ongoing compliance and quality standards

Becoming a CAA is not a one-time event. The IRS conducts compliance reviews, which may be in person or by correspondence. CAAs must cooperate fully with these reviews, as well as with requests from the Treasury Inspector General for Tax Administration (TIGTA) or the Government Accountability Office (GAO). Noncompliance can result in removal from the program. 

Quality is at the heart of the CAA agreement. The IRS monitors the accuracy of every Form W-7 and ensures that agents follow program requirements effectively. CAAs can authenticate passports and birth certificates for dependents; however, other dependent documents must be submitted directly to the IRS. For primary and secondary taxpayers, CAAs may authenticate all identification documents except foreign military IDs, which must be submitted by mail or in person at a Taxpayer Assistance Center. 

Each application must include Form W-7 (COA), the Certificate of Accuracy, confirming that the CAA reviewed original or certified copies of identification documents. Every applicant, including primary, secondary and dependent students, must complete an in-person or video interview. If the meeting is virtual, the CAA must still have the original documents or certified copies in hand. 

A trusted resource for international taxpayers

The CAA program has a long history of helping taxpayers meet their filing requirements while protecting the integrity of the tax system. Understanding the role of CAAs and the IRS’s updated process brings clarity to a system that affects many international taxpayers and the professionals who support them. If you are considering becoming a CAA or need assistance with your ITIN application, now is an ideal time to take advantage of these improvements.