OptOutPrescreen.com is a centralized service which manages requests from consumers to opt-out, or opt-in, of offers from firms offering credit or insurance. It is a joint venture between Equifax, Experian, Innovis, and TransUnion, which collectively make up just about the entire credit reporting industry. By going to their site, you can permanently opt-out from receiving credit card and insurance offers in the mail. Think of all the trees you can save!