I found with discover card, that when I mentioned I really didn't want sales calls advising me of extra services, that the calls immediately stopped. Before then, I was getting one every couple weeks, for some service I didn't want or need. My dad passed away in 2009 and I got a letter from a credit card of his saying they were dropping him if he didn't make a purchase by August of this year. I tried their customer service line and never could reach a human. I did find out that his balance was 0 (good luck collecting on that, if it wasn't). I guess I really didn't need to call them, just thought I'd tell them not to bother reaching him.