Court halts robocalls aimed at senior citizens

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A federal court has temporarily pulled the plug on a nationwide telemarketing operation that used illegal robocalls to trick seniors across the U.S. and Canada into buying medical alert devices they had not ordered.

The prerecorded phone message (listen to the robocall) was cleverly produced so that it did not sound like a typical recording.

In its lawsuit, the Federal Trade Commission said fraudulent robocalls told seniors they were about to be shipped a "free" alert system that had been purchased for them by a family member or friend. And not just any system, the recorded message falsely said it was a Life Alert—the original "I've fallen and can't get up" product advertised on TV.

(Life Alert had nothing to do with this. In fact, it sued to have the robocalls stopped.)

The FTC received more than 67,000 complaints about this telemarketing campaign.

(Read more: Free service proves it can block pesky robocalls)

"These telemarketers used illegal robocalls to make a sales pitch that was 100 percent false," said Jessica Rich, director of the FTC's Bureau of Consumer Protection in a statement. "Their M.O. was to take advantage of older people's concerns about their health."

Using technology to deflect robocalls

People who responded to the robocall pitch and pressed "1" on their phone were connected to a sales representative who allegedly continued the deception by providing false information about the monthly monitoring charge.

According to the FTC, customers were told the monthly monitoring fee would only be charged once the system was installed and activated. In reality, victims were charged $34.99 as soon as they agreed to receive the system, whether it was activated or not.

(Read more: Scammers use 'Life Alert' name to swindle seniors)

It's believed the companies that ran this marketing campaign took in more than $13 million in commissions since March of 2012. Prosecutors said some of the people who responded to the bogus pitch suffered from dementia.

The court has frozen the assets of the fraudsters and Florida Attorney General Pam Bondi, who worked with the FTC on the case, said her office will do everything possible to compensate the thousands of people who lost their money.

(Read more: Push is on to get 'kill switch' into smartphones)

"We will not tolerate unscrupulous individuals targeting the elderly," Bondi said.

Read more about the case on the FTC website. The FTC has a robocalls Web page that has information about the ongoing problem.

—By CNBC contributor Herb Weisbaum. Follow him on Facebook and Twitter @TheConsumerman or visit The ConsumerMan website.