What I sent to "Hints from Heloise" today...

I have lived at my residence almost 8 years, and I'm still getting junk mail, mostly credit card offers, for a previous occupant. I've tried everything from forwarding the junk mail to contacting the companies that send it, and yet it keeps coming. How do I get it to stop, and how do I make sure such offers for me aren't being sent to my old addresses? It feels like identity theft waiting to happen.