BOCA RATON, Fla. and DALLAS—Fed up with customer complaints about lying, cheating and stealing by door-to-door salespeople, ADT and Monitronics this month have filed lawsuits against the salespeople ...

NASHVILLE—ADT says unscrupulous door-to-door sales reps have some new scams and the Electronic Security Association has updated its code of ethics to specifically ban them. “One of the new ones is ...

Home-security systems provider ADT Corp. shared the personal information of website visitors with TikTok Inc. in violation of the California Trap and Trace Law, a proposed federal class action said.