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ADT Security Services review: Receiving bills for services after cancellation for almost 9 months

Cynthia M de Leon of US

Apr 15, 2026 3:32 pm UTC

Verified customer

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We had a security system initially through Alder. At the end of July 2025 our Alder equipment needed new batteries and maintenance. When we called, we were told that ADT bought Alder. In August, ADT Tech came to see our system said we needed a new system, we would have to renew with ADT and pay through October 2025. We paid but canceled by October.

Desired outcome: Stop harrassment, calls from creditors and mailings from ADT for balance they say we owe. We had requested cancellation and they continue to contact us for payment despite numerous calls since August of 2025.

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ADT Security Services Contacts

ADT Security Services phone numbers

+1 (800) 884-4226

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Residential, Sales

+1 (800) 521-1734

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+1 (888) 244-4505

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Business, Sales

+1 (800) 515-2216

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Business, Customer Service

+1 (877) 801-7387

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Health & Senior Safety, Sales

+1 (800) 658-7134

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Health & Senior Safety, Customer Service

+1 (844) 225-5723

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ADT Security Services emails

alwaysthere.c@adt.com

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info@adt.com

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Support

ADT Security Services address

1501 Yamato Road, Boca Raton, Florida, 33431-4438, United States

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