DUNS Number. The DUNS number of whoever actually handles the mailing (either the mail owner or a third-party designee) must appear in the PIC in the privately printed barcode (see 2-8) and in the Detail Records of an electronic file (see 3-4.3). The DUNS number of whoever actually transmits the electronic file (either the mail owner or a third-party designee) must appear in the Header Record of that electronic file (see 3-4.2).
Postal Service Approval. For privately printed barcoded forms and/or labels, a Postal Service MDA must approve the design, and the NCSC must certify for the barcodes (see 2-8.2).
Entry Facility ZIP Code. If the entry facility is a bulk mail center or sectional center facility, then the mail owner or third-party designee enters the ZIP Code for that facility rather than for a Post Office.
Client DUNS number (if a third-party designee is transmitting files on behalf of the mail owner/client, so that the Postal Service knows where to send extracted delivery information in bulk). Client DUNS number allows a third-party designee three options:
Mail one or more clients’ mail using a unique DUNS number assigned to the client(s) and placing the number(s) in the Client DUNS Number field of Detail Record 1. The third-party designee’s DUNS number appears in the Header Record and in the PIC.
Customer Reference Number. The mail owner or third-party designee has the option of using this number for internal purposes. Only the mail owner or third-party designee uses this number — the Postal Service neither validates nor endorses it. The number must not contain personal information that can be traced back to an individual (e.g., a social security number or driver’s license number).
