Hi. I've lost count of how many of these I've received so I opened the latest one, phoned Past Due Credit Solutions (number from their site, not the one on the letter), explained the situation and gave the pleasant and helpful lady the following information: - the case number; - the person's name; and - the address the letters were being sent to. She said she'd stop them being sent to my house any more! All seemed very easy to be honest. I guess the RTS attempts have either never been RTS'd or they simply ignore/have no process for handling them; I didn't feel having a chat about that side of things with her would have helped much. Hope that's useful for someone.