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Division of

Criminal Investigation

Tax Fraud Hotline

Revenue is asking you, as a citizen, to help identify individuals or businesses who do not file or pay Delaware taxes or who file fraudulent returns.

Report Tax Fraud

If you suspect someone is committing tax fraud, you can fight back by contacting the Criminal Investigation Unit via email or calling our confidential TAX FRAUD HOTLINE at (302) 577-8958.

We would be interested in obtaining all the information you may know about the subject, including:

Possible unreported income
Place of employment
Financial institutions utilized
Uses of unreported income

Revenue’s Criminal Investigation Unit serves the citizens of the State of Delaware by investigating allegations of tax fraud in a manner that enhances voluntary compliance and promotes public confidence in the tax system.


We believe that honest taxpayers deserve to know that there is a consequence for those who intentionally violate the law.

Press Releases

Report Fraud by a Business, Contractor or Landlord

If you have a complaint about a business, contractor or landlord, you should contact the Delaware Attorney General’s Office at (302) 577-8600 or visit their online Consumer Complaints page.

Report Fraud in State Government

If you have evidence of fraud, waste, or abuse in State of Delaware Government, you should call 1-800-55-FRAUD or visit the Delaware Auditor’s Fraud, Waste and Abuse page.

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