Warning: ADT and Better Business Bureau taking complaints about home security saleman

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ST. LOUIS (KTVI) – You've seen the blue ADT signs staked in yards as a deterrent, a kind of warning that a home is armed with a security alarm.

But they can make you a target of a scam.

Brian Henneman, of south St. Louis recalls a sales representative came to his home earlier in the week, saying he was with ADT, and needed to change the Honeywell keypad.

“He knew my name, my wife's name, all that stuff, he was friendly, a nice young guy” said Brian Henneman.

The problem, Henneman said he doesn’t have an ADT home security system and hasn’t for years. The sign is still in his yard because he never removed it once he switched companies. Henneman got the feeling something wasn’t right and eventually got the sales rep to leave. He says he watched him knock on doors on other homes in the neighborhood.

“He was looking for ADT signs,” said Henneman. “He had an ADT shirt and he even had a badge around his neck.”

ADT and the BBB have taken complaints like this from all over the country and right here in St. Louis.

They say the salesmen usually work for legitimate companies and try to get you to switch to their service with aggressive tactics and sometimes downright lie.

"They're telling stories like, ‘ADT has gone out of business, we’re here to sign a new contract or we’re with a new affiliated partnership with ADT and were here to take over your account,” said Bob Tucker, and ADT Spokesperson.

The results usually mean higher bills for customers.

ADT says it will never send a representative to your home to repair or replace equipment without an appointment. If you're ever in doubt, it's ok to ask for identification which you can then call and confirm with ADT.

Henneman said he watched the sales rep in his case leave in an unmarked red pickup truck, and notified police.