Transcript for Single Largest Tax Scam of its Kind in History
Jon, thank you. Your money tonight. Your tax return. With tax day approaching, a startling warnings, tens of thousands of Americans scammed, more than $1 million and counting. ABC chief business correspondent Rebecca Jarvis on how to protect yourself. Reporter: This tax season, from coast to coast, criminals posing as irs agents, going further than ever before to get their hands on your money. I'm calling from the irs. Reporter: The treasury department warning tonight -- criminals are posing as irs agents and police, telling people they owe money and must pay at once. Those who refuse are threatened with arrest, deportation or suspension of a driver's license. Some of the scammers even leave voice messages with callback Numbers. When this victim called it back, they told him they would only accept cash. No debit cards, no credit cards, no checks. Reporter: We tried dialing one of them given to us by the police. It was still working. Please leave your message. Reporter: Clearly the person on the other end of that phone wants you to think he's a police officer. His voicemail picks up after one ring. Here is my badge number." Some are going even further. 911. What's your emergency? Reporter: Scamming the victim to think that the police were coming to arrest him for not paying the taxes. . The largest scam of its kind. You can protect yourself, they're never going to call you and aggressively demand money. Call the number back online and the irs does not call you. They're not going to do. Now to an update on a story you covered for us.
This transcript has been automatically generated and may not be 100% accurate.