Publication 91 - Confirmation Services Technical Guide

Barcode Specifications
barcode component. The AI must be keyed as part of any data manually
entered and/or when data is transmitted. Neither AI 91 nor 420 can be in
parentheses.
Service Type Code
Table B-1 in Appendix B lists all Service Type Codes.
Customer ID
The Customer ID number uniquely identifies business entities at specific
physical addresses that generate mailings, meaning each address must be
assigned a unique D-U-N-S Number. Customers may request their 9-digit
Customer ID (D-U-N-S Number) by contacting Dun & Bradstreet by phone at
800-333-0505 or via the Internet at www.dnb.com.
Sequential Package ID
Customers assign an 8-digit Sequential Package Identifier. This string of
numbers may be a variable-length field of 2 to 8 digits using the UCC/EAN
Code 128 symbology. All other symbologies must contain a fixed string of 8
digits.
Check Digit
A MOD 10 check digit is required in the last position for all barcodes and is
used to detect errors resulting from manual data entry or data transmission
errors.
General
USS Code 128 and UCC/EAN Code 128
Both MOD 10 and MOD 103 are used as check sums for both Code 128
symbologies. USS Code 128 and UCC/EAN Code 128 symbologies have a
mandatory MOD 103 check-sum digit. This additional digit is considered
overhead; it is unique to the Code 128 symbology and is not a data element.
The MOD 10 check sum is positioned as the last digit and is part of the
human-readable presentation of data. The MOD 10 check sum is also
manually keyed and transmitted as data. The MOD 103 check sum is
positioned as the last digit but is not part of the human-readable presentation
of data. It is also not manually keyed nor transmitted as data.
For mailers using a concatenated barcode (see Exhibit G-2), the MOD 10
check digit must be calculated using only the Delivery Confirmation and
Signature Confirmation service tracking barcode elements. See DMM C850.
USS Code Interleaved 2 of 5
An industry standard MOD 10 check sum must be used for Code Interleaved
2 of 5. This check sum is part of the human-readable data presentation,
manually keyed, and is transmitted as data. The algorithm for calculating the
MOD 10 check digit appears at the end of this appendix. It is a check-sum
Publication 91, September 2002
79