Behind the USPS’ Delay of Intelligent Mail Barcodes

Code IMB
Another element of the USPS’ proposal that has raised numerous concerns is the requirement that the mailer ID field of the IMB be a code assigned to the mail “owner.” In the often complex mail supply chain, the USPS’ proposed requirement for the mailer ID would’ve made it a very cumbersome, complicated and often impossible requirement to achieve for many mailers. The USPS said it would revise the mailer ID requirement to allow new options.