Opt-out

Opt-outs are several methods by which individuals can decide not to receive unwanted products or service information. This option is usually related with direct marketing campaigns such as, e-mail marketing, or direct mail.
The U.S. Federal Government created the United States National Do Not Call Registry to reduce the telemarketing calls consumers receive at home. Initially numbers listed on the registry were due to be kept for five years but will now remain on it permanently due to the Do-Not-Call Improvement Act of 2007, which became law in February 2008.