Any ideas what led him to believe you no longer lived there?

In a related story, on Saturday, I started recieving mail for someone I've never heard of. Not too unususal, right? Somehow a name and address gets screwed up in a database somewhere. But, in this case, it had an address listed on it that wasn't mine which had been crossed out and my address written in by the post office. So, somehow, they decided that someone else now lives where I do. At least I didn't stop getting mail actually addressed to me. I think.