look them up in BBB.com
They also sent me two post cards at the same time with same address. 1 for the water update and the other said, Congratulations on your new home.   We have been trying to contact you regarding your $50 Amazon gift card to celebrate your new home! We will only able to hold your gift card for a limited time. Please call at your earliest convenience. 302-544-7145 .  The address on card is AWP  74 Southgate BLVD.   New Castle ,DE 19720 same as the Water Update postcard