ADT Security Services, also known as ADT Fire and Security, is a major supplier of electronic security and fire alarm systems, communication systems, and integrated management systems. Established in 1874, it was acquired by Tyco International in 1997, and is headquartered at Boca Raton, Florida. It is one of the major players in the security equipment industry catering to home, small businesses, and medium and large business segments. The company's wide range of electronic surveillance equipment includes home security systems, intruder alarms, public address and voice alarms, access control and fire alarm systems. ADT has branches across the globe including Europe, Africa, Asia, and Australia.

Utilized across the globe, the security systems and services provided by ADT help to make the lives of the users safer and secure. ADT also provides warning stickers and decals that can be displayed outside walls and common entrances. The warning stickers or signs are meant to notify strangers of the presence of any surveillance system in the vicinity. They also act as a 'visual deterrent' for potential burglars and provide a first line of defense, besides peace of mind, to the users.

ADT security stickers are used by people even when they do not employ such security and surveillance systems. These fake stickers are a great source of 'fake guard' that can scare burglars from trespassing restricted areas. These stickers can be displayed at strategic places around the vicinity such as the inside of windows or outside the house. They are available in different sizes and in double-sided displays that make them highly visible.