See also: Opt-In, Opt-In Email

CIMM DEFINITION: A form of consumer choice requiring consumers to affirmatively decline permission for their information to be used for specific purposes.  In the absence of such affirmative notification, the information gatherer may assume that it can use the information for other purposes

2: When a company states that it plans to market its products and services to an individual unless the individual asks to be removed from the company’s mailing list. (Source: IAB)