I've been having the same problem with these people. However, the address "Jim gave me was PO Box 4635, Chesterfield, MO 63006-4635. I sent a letter requesting debt validation and cease all contact with delivery confirmation. I checked the USPS website today - either the address is wrong or the zip code is wrong and my letter was forwarded. I will update as soon as I have a verified address. BTW, they are VERY underhanded and "Jim" was quite rude on the telephone. I had to 'put up' with his abuse until he (finally) gave me their mailing address, apparently the WRONG mailing address at that!