I called the number below. There is a 2 year and permanent opt out option:
From Clark Howard Show Notes Tuesday, July 22...
But if it's junk mail you hate, you can do something about it by contacting the Direct Marketing Association. Send your request for "no more direct mail" to:
DMA
Mail Preference Service
P.O. Box 9008
Farmingdale, NY 11735
If you don't feel like sending the letter, you can go to the Web site, the-dma.org and pay $5 to request no more mail. You can also call 1-888-5-OPT-OUT to have your name removed from the database for sending out pre-approved credit cards.