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Participants who claim one of the USPS Mailing Promotions can enhance their campaign with environmentally conscious materials by demonstrating that the paper used in the mailing came from a certifiable, responsible source. The add-on runs January 1, 2027 through December 31, 2027, registration is October 15, 2026 through December 31, 2027, and the discount is 1%. Eligible mail includes First-Class Mail letters, cards, and flats, Marketing Mail letters and flats, and Nonprofit Marketing Mail letters and flats.
