The Postal Service uses an “opt in” standard for individual customers, which means that customers must affirmatively authorize the Postal Service to use or share personal information for these “secondary” purposes. Additionally, the Postal Service must provide individual customers with the ability to select or change their preferences in a consumer-friendly manner. Preferences can be documented through a checkbox on a hard copy form or webpage, or through another means that is convenient to the customer. The Postal Service must give customers the ability to modify their previous decisions so that their current choices and preferences are respected.