Enrolled Agents are licensed tax professionals recognized by the Internal Revenue Service with the highest credential granted to those authorized to represent taxpayers. By becoming Certified Acceptance Agents, Enrolled Agents can expand their services and help clients who are not eligible for a Social Security number but must still file a federal income tax return using an Individual Taxpayer Identification Number. This role supports a growing population of taxpayers who face barriers to meeting filing requirements due to their immigration status or foreign residency.

The IRS Acceptance Agent Program allows CAAs to verify original identification documents for ITIN applicants, reducing the need for individuals to send sensitive documents directly to the IRS. These applicants often include nonresident aliens, overseas workers, and foreign spouses or dependents. CAAs help streamline this process by ensuring documents are complete and accurate, which prevents delays that may affect tax outcomes such as refund issuance or eligibility for credits like the Child Tax Credit.

Becoming a Certified Acceptance Agent also expands the services tax professionals can provide, particularly for clients who face challenges in meeting filing requirements. This guide explains how Enrolled Agents can qualify as CAAs, navigate the application process, and deliver document verification services to meet ITIN-related tax obligations.

Federal Income Tax Return

Filing a federal income tax return is a legal requirement for many individuals living or earning income in the United States, regardless of their citizenship or immigration status. Those who do not qualify for a Social Security number but must meet U.S. tax obligations must apply for an Individual Taxpayer Identification Number to submit their returns accurately. 

These individuals may include foreign nationals with U.S. income, dependents of U.S. residents, or spouses not eligible for employment-based identification numbers. The Internal Revenue Service uses the information provided in the return to determine tax liability, eligibility for certain credits, and refund amounts.

When an ITIN Applicant Must File

  • Individuals who earn income from U.S. sources above the filing threshold must file a federal income tax return.

  • ITIN applicants claiming credits, including the Child Tax Credit, must file a complete return with Form W-7.

  • Documentation must demonstrate a valid relationship and proper filing status in cases involving a dependent or spouse.

  • Individuals filing jointly with a spouse with a Social Security number may still require an ITIN for the second filer.

  • For IRS review, returns must include accurate wage statements, withholding amounts, and adjusted gross income.

What the IRS Considers a Valid Return

  • Must include all required forms and schedules.

  • Should reflect accurate income details for the tax year in question.

  • Cannot omit signatures or taxpayer identification numbers.

  • Must show appropriate filing status, such as married filing jointly or head of household.

  • Supportive documentation should be attached to confirm income and eligibility for claims.

Providing a complete and valid tax return is central to the ITIN application process. Errors or missing information can delay ITIN issuance, prevent refunds, or create processing backlogs. Ensuring each tax return meets IRS standards helps support accurate recordkeeping and compliance for the filer and the Certified Acceptance Agent.

Individual Taxpayer Identification Number

The Individual Taxpayer Identification Number (ITIN) is a tax processing number issued by the Internal Revenue Service to individuals who are not eligible for a Social Security number but still have federal tax reporting requirements. Created to facilitate compliance, the ITIN is used exclusively for tax purposes and does not grant work authorization, immigration benefits, or eligibility for Social Security benefits. Each ITIN is a nine-digit number beginning with nine and formatted similarly to a Social Security number.

When an ITIN Replaces a Social Security Number

The ITIN is a substitute for individuals who do not qualify for a Social Security number but must file a U.S. tax return. This includes taxpayers who receive U.S. income but do not have employment authorization or lawful permanent resident status. In these situations, the ITIN is used on tax returns, withholding forms, and other documents that require a taxpayer identification number.

Who Qualifies for an ITIN

Eligibility for an ITIN includes a broad range of individuals with federal tax obligations. Familiar applicants include spouses or dependents of U.S. citizens and resident aliens, nonresident aliens with U.S. source income, international students on visas, and individuals claiming benefits under a tax treaty. In each case, the applicant must demonstrate a clear tax purpose, such as filing a return or being listed as a dependent or spouse on a federal income tax return.

The Internal Revenue Service issues ITINs to support accurate tax administration for individuals who cannot obtain a Social Security number due to citizenship or immigration status. These identifiers ensure tax reporting compliance for individuals without access to a Social Security number. Proper use of an ITIN helps avoid processing complications and supports fulfillment of federal reporting requirements.

IRS Taxpayer Assistance Center vs. CAAs

When individuals apply for an Individual Taxpayer Identification Number, they often face logistical challenges in verifying identity documents, primarily if they reside outside the United States or have limited access to physical IRS facilities. The IRS Taxpayer Assistance Center (TAC) offers in-person services, but access may be restricted based on appointment availability, regional coverage, and documentation policies. In contrast, Certified Acceptance Agents (CAAs) provide a more flexible solution for document authentication, offering services that better accommodate overseas applicants, taxpayers with complex situations, or those needing expedited support.

Comparison of Services and Access

  • Appointment Requirement
    • TAC: Required in most locations
    • CAA: Not needed; services arranged independently
  • Original Identification Documents
    • TAC: Must be surrendered temporarily to the IRS
    • CAA: Reviewed and returned immediately to the applicant
  • Accessibility
    • TAC: Limited to physical office hours and geographic availability
    • CAA: Accessible locally or virtually, depending on the agent’s policies
  • Verification Role
    • TAC: IRS staff review identity documents in person
    • CAA: Authorized to verify identity on behalf of the IRS
  • Processing Time
    • TAC: Delays are common due to high volume or incomplete submissions
    • CAA: Typically faster because of pre-verification and fewer errors
  • IRS Secure Access (locked padlock icon)
    • TAC: Available through the IRS online login system
    • CAA: Not applicable
  • Certified Acceptance Agents can validate original identification documents and submit supporting paperwork through the IRS ITIN Acceptance Agent Program. This process minimizes the risk of mailing errors or document loss, offering a more secure and efficient experience for both the applicant and the reviewer.

    Certified Acceptance Agents may provide services that reduce reliance on physical office visits, with the ability to verify documents securely and lower mailing risks. A CAA offers a different option than the traditional TAC route for applicants who must obtain an ITIN while managing accounts, refund timelines, or overseas logistics.

    ITIN Applications

    An Individual Taxpayer Identification Number (ITIN) is required for individuals who are not eligible for a Social Security number but must file or be listed on a U.S. federal income tax return. The IRS assigns ITINs strictly for tax processing purposes. Applicants must demonstrate a valid tax reason and provide accurate supporting documents. Below are the most common scenarios in which a person may be required to apply for an ITIN.

    • Nonresident aliens with U.S. tax obligations: Individuals without permanent U.S. residency who receive income from U.S. sources must file a return and often need an ITIN to meet IRS requirements.

    • Foreign property owners earning rental income: Nonresident individuals who own and generate rental income from U.S.-based real estate must report that income, typically using an ITIN.

    • Dependents or spouses of U.S. citizens or resident aliens: Family members not eligible for a Social Security number but listed on a federal income tax return must apply for an ITIN, supported by birth certificates and residency proof.

    • Resident aliens lacking employment authorization: Those who meet the substantial presence test but do not qualify for a Social Security number may still need an ITIN to comply with their filing requirements.

    • Applicants seeking the Child Tax Credit: Dependents claimed for this credit must hold a valid ITIN or SSN and satisfy IRS documentation standards, including proof of residency and relationship.

    • International students and exchange visitors on visas: Individuals on academic or cultural exchange programs who receive taxable income or scholarships often require an ITIN for tax reporting.

    Applying for an ITIN involves more than submitting Form W-7. Each applicant must clearly identify the purpose of the tax and ensure the application is supported with proper documentation. Evidence of immigration status, income, and family relationships helps prevent delays or denials during IRS review.

    Eligibility and Required Documentation

    To qualify as a Certified Acceptance Agent, individuals or organizations must satisfy specific requirements set by the Internal Revenue Service. These requirements help ensure those handling taxpayer identity verification have the proper authorization, compliance history, and professional standing. Enrolled Agents are especially suited for this role due to their ability to represent taxpayers at the federal level and their familiarity with IRS systems.

    Required Qualifications for Individuals and Entities

    • All responsible parties listed on the application must be at least 18 years old at the time of submission.

    • Applicants must submit documentation proving current enrolled agent status or another IRS-recognized professional credential.

    • Each responsible party is required to hold a valid and active Preparer Tax Identification Number.

    • Business applicants must provide an Employer Identification Number issued by the IRS.

    • Applicants must demonstrate a compliance history free of recent tax filing violations, penalties for misconduct, or ethical breaches.

    Supporting Documentation and Verification Details

    • Proof of U.S. citizenship or legal residency may be required for certain applicants and must be submitted using accepted documentation such as a passport or certificate of naturalization.

    • Entities must include their IRS EIN assignment letter and documentation verifying business formation or registration.

    • Each mailing address used for CAA-related services must be documented and associated with the business or individual applying.

    • Supporting documents must include training certifications, credential verification, and any required identification information in original or certified format.

    Meeting each eligibility requirement is essential to establishing trust and demonstrating readiness to perform CAA duties. Submitting a complete, well-documented application enables the IRS to evaluate the applicant efficiently. A detailed and organized submission reduces review delays and strengthens the CAA applicant's reliability.

    Apply for an ITIN

    The Certified Acceptance Agent application must be submitted through the IRS e-Services portal. Enrolled Agents pursuing this status must complete required training, assign designated roles, verify identities, and submit correct documentation through the designated upload tool. Timeliness, accuracy, and credential verification are essential throughout the process.

    Step-by-Step ITIN Application Process

    1. Complete IRS ITIN Acceptance Agent Training: All responsible individuals must complete this free training provided by the IRS. It includes guidance on Form W-7, ITIN rules, and agent duties. A valid certificate of completion is required for submission.

    2. Complete Forensic Document Training: Only IRS-approved providers can issue certificates for this specialized training, which covers document security features, fraud detection, and the correct handling of original identification documents.

    3. Register for IRS e-Services: All principals, responsible parties, and authorized contacts must create accounts in the IRS e-Services system. Each individual is required to verify their identity through ID.me.

    4. Identify and Assign Application Roles: Clearly identify each participant’s role on the application. Principal, Partner, or Owner (PPO), Responsible Party (RP), and Contact designations must be consistent with IRS definitions. Each individual must sign electronically.

    5. Submit the Electronic Application: Once all fields are complete and roles assigned, submit the application through e-Services. Incomplete submissions or role mismatches may result in application delays.

    6. Observe the 24-Hour Waiting Period: After submission, the IRS requires a 24-hour delay before uploading supporting materials through the Document Upload Tool.

    7. Upload Supporting Documentation: Applicants must upload original certificates and credentials using the official system. This includes proof of forensic training, EA certification, and other relevant records. The process is outlined in IRS Publication 4520.

    Each step contributes to accurate application completion and approval. Proper execution ensures the submission is processed without avoidable delays. Enrolled Agents should track their submission dates and retain digital copies of all uploaded materials. Clear documentation, verified credentials, and role accuracy improve the likelihood of a successful outcome.

    Enrolled Agent Training and Verification

    Training is essential for Enrolled Agents seeking to become Certified Acceptance Agents. The Internal Revenue Service provides a mandatory ITIN Acceptance Agent course that must be completed before applying. This free training covers the fundamentals of ITIN use, the role of CAAs, and the proper preparation of Form W-7. Completing the course provides a certificate that confirms eligibility and readiness to proceed with the application process. Professional credentials, such as the Enrolled Agent, must also remain current to satisfy program requirements.

    A second layer of training involves document authentication. The IRS requires all CAAs to complete a forensic training program through an approved third-party provider. This course teaches individuals how to identify fraud indicators, evaluate security features, and verify original identification documents. A certificate of completion must be submitted as part of the application package, and it demonstrates proficiency in assessing document authenticity. Training providers must meet IRS standards to confirm the program equips CAAs with the necessary knowledge and skills.

    The training programs emphasize the ability to review standard identification documents such as passports, birth certificates, national identity cards, and other documents issued by government authorities. Each document type contains security elements requiring close examination during verification. Enrolled Agents must master these verification techniques to establish trust with clients and the IRS.

    Completing both training programs establishes the foundation for accurate ITIN processing and compliance with program requirements. Enrolled Agents who demonstrate attention to detail during training are better prepared to verify documentation correctly and maintain the standards required of Certified Acceptance Agents. Strong training completion records also reinforce the reliability of the professional’s role within the IRS framework.

    Uploading Supporting Documents

    Once the Certified Acceptance Agent application is submitted through the IRS e-Services system, the applicant must complete the process by uploading the required supporting documentation. The IRS has established a secure upload tool to transfer sensitive records safely. Access to this system becomes available twenty-four hours after the electronic application is filed, and applicants must adhere to this waiting period before proceeding.

    Action Steps for Uploading Documents

    • Access the IRS Document Upload Tool through the applicant’s registered account and confirm system availability.

    • Prepare all supporting documentation in the correct format before logging in, ensuring that files are clear, legible, and properly labeled.

    • Upload the certificate of completion for ITIN Acceptance Agent training to verify participation in mandatory IRS education.

    • Upload the forensic training certificate issued by an approved provider as proof of document verification qualifications.

    • Upload professional credentials, such as the Enrolled Agent certificate, that are confirmed as valid at the time of submission.

    • Include business identifiers such as the Employer Identification Number and confirm that the mailing address on file matches the information submitted in the application.

    • Review each document uploaded to confirm the package is complete, accurate, and consistent with IRS requirements.

    The IRS acceptance agent application FAQ outlines specific guidance on supporting documentation and explains how applications are evaluated for accuracy and completeness. Each applicant must ensure all items are uploaded without omissions, as incomplete submissions can delay approval or lead to rejection. Maintaining thorough records of what was uploaded provides accountability and supports smooth communication with the IRS if issues arise. A precise and complete document upload is essential in gaining approval as a Certified Acceptance Agent.

    Maintaining Compliance and Responding to Reviews

    Compliance is central to the responsibilities of Certified Acceptance Agents. Once approved, the IRS expects CAAs to follow established quality standards, maintain accurate records, and participate in regular oversight. Failure to meet these requirements can result in penalties, suspension, or termination of the agreement, underscoring the importance of careful adherence to each obligation.

    Annual Activity: Certified Acceptance Agents must submit at least five ITIN applications yearly to remain in good standing. Falling below this threshold may trigger review or jeopardize renewal eligibility. Consistent activity reassures the IRS that the agent is actively engaged in the program.

    Document Storage: The IRS requires CAAs to maintain records of all applications, Certificates of Accuracy, and supporting documentation for a minimum of three years. Proper retention allows the agency to confirm that procedures were followed correctly and that information remains verifiable.

    IRS Oversight: Compliance is monitored through physical and correspondence reviews conducted at intervals determined by the IRS. During these reviews, the agency evaluates the accuracy of applications, stored documents, and the consistency of procedures with official guidelines. Receipt of a notice for review requires prompt cooperation and timely submission of requested materials.

    Renewal Timeline: A CAA agreement typically lasts four years. To ensure uninterrupted authorization, the renewal process should begin six months before expiration. Renewal requires proof of training completion, updated credentials, and continued compliance with IRS standards.

    Maintaining compliance extends beyond minimum requirements, encompassing process integrity and public confidence in tax administration. Enrolled Agents serving as CAAs who meet activity requirements, prepare for oversight, and observe renewal deadlines reinforce their reliability as trusted representatives in tax matters.

    Common Application Errors

    Certified Acceptance Agent applications and ITIN submissions require accuracy at every step. Even minor errors can result in review complications, correspondence reviews, or delays in taxpayer refunds. Recognizing the most frequent issues helps Enrolled Agents prepare complete files and minimize the risk of rejection.

    1. Expired identification documents: Applications are automatically rejected when expired passports, birth certificates, or other records are submitted. Only current, valid documents establish identity and foreign status.

    2. Incomplete applications: Missing information, unchecked fields, or incomplete forms cause the IRS to suspend processing. Each file should be reviewed thoroughly before submission.

    3. Inconsistent names across documents: Differences in spelling or formatting between tax returns, Form W-7, and supporting materials frequently trigger additional IRS review. Ensuring consistency across all records reduces correspondence reviews.

    4. Missing signatures or late renewal filings: Applications without signatures or received after the due date are considered invalid. Renewal planning months ahead of the expiration date avoids interruptions in authorization.

    5. Poor-quality document scans: Blurry, cropped, or incomplete images are rejected, as the IRS must verify details without error. Preparing clear and legible scans ensures the application is processed smoothly.

    6. Refund delays involving overseas claims: Errors in mailing addresses, account details, or missing attachments often delay refunds for taxpayers living abroad. Proper preparation of all accounts and income information avoids money-related setbacks.

    Preventing these common errors requires strong internal review procedures and precise attention to documentation. Enrolled Agents prioritize accuracy and consistency in every file, strengthening their role as dependable Certified Acceptance Agents.

    Frequently Asked Questions

    What is Form W-7, and why is it important?

    Form W-7 is the official IRS application for an Individual Taxpayer Identification Number. Individuals who are not eligible for a Social Security number must use this form to request an ITIN when filing a federal tax return. The IRS requires applicants to provide supporting identification records and a valid tax purpose. Completing Form W-7 accurately supports timely processing and reduces the chance of review or rejection.

    What types of citizenship documents are required for ITIN applications?

    Applicants must provide original or certified copies of acceptable records to confirm their identity and foreign status. Standard citizenship documents include passports, national identification cards, and birth certificates. Each document must be valid and current at the time of submission. The IRS will not accept expired documents or poor-quality copies. Providing accurate and verifiable documentation supports smoother processing and helps applicants meet federal filing obligations.

    How does the new application process differ from the old system?

    The IRS modernized the Certified Acceptance Agent application process by moving it to the e-Services platform. Previously, paper submissions caused delays and required extensive manual handling. Under the new application process, applicants submit materials electronically, upload supporting documents through the secure portal, and receive faster acknowledgments from the IRS. This system reduces errors, increases efficiency, and verifies training and credential records before applications are approved.

    Why should Enrolled Agents consider becoming CAAs?

    Enrolled Agents already represent clients before the IRS in all tax matters, holding the highest credential available to tax professionals. Expanding into Certified Acceptance Agent services allows them to support individuals who require ITINs but lack a Social Security number. Offering these services allows enrolled agents to expand support for taxpayers navigating compliance requirements. The role broadens service scope while reinforcing professional expertise.

    Can Certified Acceptance Agents help with dependent ITIN applications?

    Certified Acceptance Agents may assist dependents and spouses of U.S. citizens or resident aliens who must be listed on a federal tax return. The IRS requires supporting records, including citizenship documents such as birth certificates and proof of residency. CAAs review these documents, complete the necessary Certificate of Accuracy, and return originals to applicants immediately. Their involvement reduces errors in dependent filings and ensures returns are processed without unnecessary delay.

    What responsibilities come with maintaining CAA status?

    To remain in good standing, Certified Acceptance Agents must comply with ongoing requirements. They must submit at least five ITIN applications annually, keep records for three years, and respond promptly to correspondence reviews or physical reviews. Renewal is required every four years and includes retraining. Consistently meeting these responsibilities protects authorization and ensures the agent continues to serve applicants effectively while remaining aligned with IRS standards and oversight.

    How long does it take to obtain approval as a Certified Acceptance Agent?

    The IRS generally processes CAA applications within sixty days, although timing can vary depending on submission volume and completeness of the file. Applications that include accurate training certificates, citizenship documents, and professional credentials are less likely to face delays. Errors, omissions, or missing signatures can extend the review timeline. Applicants should plan accordingly to ensure authorization is granted before peak filing seasons.