Customer FAQs Discover answers to the most frequently asked questions from ADT customers with the click of a button. 1. I lost my invoice and want to send a payment. What address do I send it to, and what should I note on my check? Log into your MyADT.com account to download your billing statements. You will find the address of the correct payment location on the statement. Indicate your ADT account number on your check, along with your name and address. Remember, you can always make a one-time payment or sign up for EasyPay on MyADT.com.