New Port Richey, Florida -- Brian Sheehan of Pasco County says something didn't seem right when he got a phone call Tuesday from someone claiming to be from the Internal Revenue Service.
"It was so bold and true and hard not to believe," Sheehan recalled to 10 News.
The man on the phone said Sheehan owed $3,600 in back taxes, had two hours to pay up or his wages would be garnished, his truck seized and a lien placed on his assets.
Yet most IRS offices are closed because of the government shutdown and Sheehan started getting suspicious as the conversation wore on.
"I asked them who did my taxes last year, they didn't have a clue so I kind of knew it was a scam and I brought it to the Sheriff's attention."
Turns out it was a scam.
But while Sheehan didn't fall victim to the scam, authorities say many others do.
"They're very convincing, they're very good at sounding as though they're whoever they say they are," said Det. Bruce Cohen with the Pasco County Sheriff's Office.
Cohen says remember, this is someone who calls you claiming to be from the IRS.
"The IRS will never call you on the phone and say we need a check within the next hour. They'll send a letter and discuss it with you and have you come into the office."
10 News called the number Brian was told to call back when he was ready to pay. But after confronting the person on the other end, the person hung up and never answered our calls again.
Sheehan says he wants people to be aware so they are not victimized.
"This is the whole reason I'm here, to save an innocent victim from getting scammed by a scam artist," he said.
Cohen says if you feel someone is trying to scam you, contact your local law enforcement agency or contact the IRS directly.
Impersonating an IRS official is a felony punishable by up to 5 years in prison.