5 IRS Warning Signs You Should Never Ignore: When to Contact a Criminal Tax Attorney

Could an ordinary IRS notice signal a more serious tax problem? Sometimes a tax dispute can escalate, but not every IRS letter means a criminal investigation is underway. Understanding what each notice means—and how to respond—can help you protect your rights and avoid unnecessary mistakes.

I’m tax attorney Chad Silver, founder of Silver Tax Group. In this article, we’ll examine five IRS communications or situations that deserve attention, explain what they may indicate, and discuss when consulting a tax attorney may be appropriate.

1. CP2000 Notice: When the IRS Questions Your Reported Income

A CP2000 notice is issued when information the IRS receives from employers, banks, businesses, or other third parties does not match information reported on your tax return.

For example, the IRS may receive a Form 1099 reporting income that does not appear on your return. The notice explains the discrepancy and proposes adjustments to your tax liability.

The IRS states that a CP2000 notice is not a bill and is not, by itself, a formal audit notification.

Does a CP2000 notice mean the IRS suspects tax fraud?

Not necessarily. Many notices result from ordinary reporting errors, missing forms, or differences in how income was reported.

However, substantial discrepancies or evidence of intentional underreporting may warrant closer examination. The circumstances surrounding the discrepancy matter.

Signing and returning a CP2000 response does not automatically constitute a criminal confession. It generally indicates whether you agree or disagree with the proposed adjustments. Before agreeing, make sure you understand the proposed changes and have reviewed the supporting records.

What to do if you receive a CP2000 notice:

• Review the notice, tax year, proposed adjustments, and response deadline.
• Compare the proposed changes with your tax return and supporting documents.
• Respond according to the notice instructions, even if you disagree.
• Consult a tax professional or attorney if the discrepancy is substantial or raises potential fraud concerns.

Official resource: IRS — Understanding Your CP2000 Notice.

2. Form 4564: Information Document Request During an IRS Examination

Form 4564, Information Document Request (IDR), is used by IRS examiners to request records and information during an examination.

An examiner may request bank statements, invoices, accounting records, contracts, receipts, or other documents relevant to the tax issues under review.

Receiving an IDR generally means the IRS is seeking information for its examination. It does not, by itself, establish that a criminal investigation is underway.

Can a civil tax audit lead to a criminal investigation?

Yes. Information discovered during a civil examination can lead to a referral to IRS Criminal Investigation if it suggests potential criminal violations.

In some circumstances, civil and criminal tax matters may involve related information or parallel investigative activity. However, an ordinary IDR is not proof that a civil audit is being used as a cover for a criminal investigation.

What should you do if you receive Form 4564?

1. Read the request carefully and identify the documents and information required.
2. Preserve relevant records and avoid altering or destroying documents.
3. Organize responsive records and ask for clarification if the request is unclear.
4. Keep track of deadlines and communications with the examiner.
5. Consider legal representation if the examination involves substantial discrepancies, possible fraud, or multiple tax years.

A tax attorney can help you understand your obligations, evaluate potential exposure, and communicate with the IRS when authorized. The objective is to respond accurately while protecting your legal interests—not to conceal information.

Official resource: IRS — How Criminal Investigations Are Initiated.

3. Letter 3164: Notice of Potential Third-Party Contact

IRS Letter 3164 generally notifies taxpayers that the IRS may contact third parties about their tax liability. Depending on the circumstances, these contacts may involve banks, employers, business associates, or other people who have relevant information.

The IRS may contact third parties to verify information, determine a tax liability, identify assets, or locate a taxpayer.

Does Letter 3164 mean the IRS believes you are lying?

No. The notice does not, by itself, establish that the IRS suspects fraud or that a criminal investigation is underway.

It does indicate that third-party contact may occur in connection with the tax matter described in the notice.

If you receive Letter 3164:

• Read the notice to understand which tax matter it concerns.
• Review any outstanding IRS information requests.
• Make sure your records and previous responses are accurate.
• Consider professional advice if you have concerns about potential tax fraud allegations or significant discrepancies.

An attorney may help communicate with the IRS and address unresolved issues. However, representation does not guarantee that the IRS will refrain from contacting third parties when such contact is permitted.

Official resource: IRS — Understanding Letter 3164.

4. Your IRS Revenue Agent Suddenly Stops Communicating

Imagine that you are in the middle of an IRS examination. Your revenue agent previously responded to your calls and emails, but suddenly stops communicating.

It is understandable to wonder whether something has changed. However, a lack of communication does not prove that your case has been referred to IRS Criminal Investigation.

Delays can occur for many reasons, including workload, scheduling, reassignment, internal review, or administrative issues.

What if the case has been referred for criminal investigation?

A civil examination can lead to a criminal referral when information suggests possible criminal conduct. The IRS has procedures governing how these matters are handled.

However, you cannot reliably determine whether a referral has occurred simply because an examiner stops responding.

What should you do if your revenue agent goes silent?

• Review prior correspondence and identify outstanding requests or deadlines.
• Follow up through the appropriate contact information provided by the IRS.
• Keep copies of correspondence and documents you have submitted.
• Consider having an authorized representative inquire about the status of your case.
• If specific facts raise concerns about criminal tax exposure, consult an attorney experienced in criminal tax matters.

Do not assume that silence means the matter has disappeared—or that you are automatically under criminal investigation. Focus on verifiable information and continue meeting applicable deadlines.

5. Direct Contact From an IRS Criminal Investigation Special Agent

Direct contact from an IRS Criminal Investigation (IRS-CI) special agent deserves particular attention. IRS-CI investigates potential criminal violations of federal tax law and certain related financial crimes.

Special agents may contact taxpayers by telephone, letter, email, or an in-person visit. They may seek an interview, request information, or ask questions about financial activities.

Does contact from a special agent mean you will be charged?

No. Contact does not establish guilt or mean that criminal charges have been filed. It does mean that you should take the communication seriously and understand the nature of the inquiry.

IRS-CI investigations involve gathering and evaluating evidence. Depending on the findings, a matter may be discontinued or referred to prosecutors for consideration.

What should you do if a special agent contacts you?

If you believe an IRS-CI special agent is contacting you about a potentially criminal tax matter, consider obtaining legal advice before participating in a substantive interview.

You can politely state that you would like to consult an attorney before answering questions. You should not lie, obstruct an investigation, or destroy records. If you receive a subpoena, court order, or other legal process, seek advice about how to respond rather than ignoring it.

You can ask to see an agent’s credentials and use official IRS resources to verify the contact if necessary.

A qualified criminal tax attorney can assess your circumstances, explain your rights and obligations, and communicate with investigators on your behalf when appropriate.

Official resources: IRS — About Criminal Investigation and IRS — How to Know It’s the IRS.

The Five IRS Warning Signs at a Glance

When Should You Hire a Criminal Tax Attorney?

Legal advice may be particularly important if you discover substantial unreported income, receive questions about potentially false tax returns, face allegations of tax fraud, or are contacted directly by an IRS-CI special agent.

An attorney can review the relevant records, explain potential civil and criminal exposure, advise you about communications with the IRS, and discuss possible next steps.

The appropriate strategy depends on the facts. A routine CP2000 notice may require a straightforward response, while a matter involving possible intentional tax violations may require a more comprehensive legal assessment.

If you have already responded to IRS communications on your own, do not assume you have lost every option. A qualified attorney can review what has happened and advise you about the options that remain.

How Silver Tax Group Can Help

IRS notices and tax examinations can be confusing, especially when you are uncertain whether a matter involves ordinary tax administration or potential criminal exposure.

Silver Tax Group assists taxpayers facing IRS disputes, tax fraud allegations, and potential criminal tax matters. The firm can review your situation, explain the relevant legal issues, and discuss possible options based on the facts.

If you have received an IRS notice or have been contacted by a special agent, contact Silver Tax Group at 855-900-1040 or visit https://silvertaxgroup.com/ to request a confidential consultation.

Final Thoughts: Take IRS Communications Seriously, but Don’t Assume the Worst

An IRS letter should not be ignored simply because it looks routine. At the same time, a notice, information request, or communication delay does not automatically mean that the government is building a criminal case.

Read notices carefully, follow applicable deadlines, preserve relevant records, and seek legal advice when the circumstances warrant it. If IRS Criminal Investigation contacts you, consider consulting a qualified criminal tax attorney before participating in a substantive interview.

Understanding what an IRS communication means—and what it does not mean—can help you make informed decisions and protect your interests.

Disclaimer: This article is for general informational purposes only and does not constitute legal or tax advice. The appropriate response to an IRS notice depends on the specific facts and applicable law. No particular outcome is guaranteed. Consult a qualified tax professional or attorney about your circumstances.