This UK security company has serious issues with customer service and with delivery of contracted and pre-paid maintenance. ADT were prepaid for 12 months in early 2022 but my mother died 3 months after that payment was made. ADT were advised of her death by the legal firm that were the Executors of her estate Nevertheless, ADT sent a renewal notice 9 months later for pre-payment for a year of rental and "maintenance" which would have commenced 9 months after her death in early 2023! I suggest that if ADT had actually tried to deliver the maintenance for an invoice sent so long after my mother's death, they would have known that rather than a debt a credit was due. Instead they had their lawyer send a threatening letter to my late mother at the home which was sold only a few months after her death. Not impressed by the ethics nor by the admin.