n mail consisting of large numbers of identical items (circulars or advertisements) sent to individual addresses at less than 1st-class rates and paid for in one lot
USPS scraps 'track and trace' mail promotion Washington, D.C.—The U.S. Postal Service has abandoned plans to offer a financial incentive to bulk mailers that adopt its Full Service Intelligent Barcode program.
June 27, 2013 - BtoB Magazine