I was reminded today that someone asked me how to make their credit card offer junk mail go away. I've been meaning to look for myself anyway, but I finally remembered to actually go and look.

Unsolicited Mail, Telemarketing and Email: Where to Go To 'Just Say No' [ftc.gov]

Calling the phone number mentions that you can also opt out of preescreened mailings online [optoutprescreen.com]

Interestingly, you have to remember to call the credit card "don't bother me" phone number once every two years. Ugh.