Published: May 28, 2014 11:31 AM EDT

LEE COUNTY, Fla.- The Lee County Sheriff's Office is warning Southwest Florida residents of a recent scam wherein callers claim to be the Sheriff's Office threatening those who don't respond to alleged Grand Jury summons.

This has becom known as the Jury Duty scam. Most recently, a male caller identified himself as Lt. John Martin and told the victim a warrant had been issued for her arrest because she failed to respond to a Grand Jury summons. The caller told the victim she could avoid being arrested if she paid a $3,996 fine; and instructed her to go to CVS, purchase a Green Dot Money Pack card (a reloadable debit card) and provide him with the serial number located on the back of the card. When the victim told the scammer she did not believe him, he passed the phone to his alleged Captain.

The Sheriff’s Office wants residents to know that under no circumstances would they ever contact you over the phone asking for money and/or threatening arrest for failure to respond to a jury duty summons. It is important to know that in this particular case, the scammer did use a local phone number and when authorities call the number back, it immediately connects to a voice mail with a message that states, "You have reached the desk of Lt. Martin with the Lee County Sheriff's Department, leave your name, number and a brief message and I will return your call."

The Sheriff's Office does not have an employee by the name of LT. MARTIN and residents should not leave a message. Anyone who receives such a call is advised to hang up. You can report this incident to the Lee County Sheriff's Office Fraud Line at 258-3292.