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Participants can enhance a qualified mailing with USPS Informed Delivery to give the mailpiece a digital element. The add-on runs January 1, 2027 through December 31, 2027 and provides a 1% discount on eligible mailpieces, with an additional 0.5% incentive for eDoc submission. Eligible mail includes specified First-Class Mail, Marketing Mail, and Nonprofit USPS Marketing Mail automation letters, postcards, flats, and carrier route saturation flats.