Morovia US Postal Fontware 3 and Code128 Fontware 3 contains code128 fonts that can be used to construct code 128 barcodes for USPS special services such as delivery confirmation and signature confirmation services. The USPS specification is available here.
It is recommended to use typeface MRV Post128
12 points
to construct such a barcode string. Font Tools package includes an encoder function, USPS_EAN128
, which is designed
to encode 20-digit service information, as below:
The barcode reader outputs 22 digits with leading prefix 91. 91 is UCC/EAN (now GS1) application identifier for USPS special service.
This barcode can be combined with address information using UCC/EAN-128 concatenation. The combined barcode is read as 30 digits, with 420 at the beginning, followed by the 5-digit ZIP code, 91, and 20-digit service information.
This section explains how you create the long 30-digit USPS code128 barcode. Before calling our encode function, you need to prepare the following information:
Delivery Address: 5-digit zip code such as 90030
Service Information: 20-digit service information, including the last modulo 10 check digit.
If you have EAN128Ex function available, use the following format
to enter the data: (420)12345(91)12345678901234567890
. Leave
420 and 91 intact, and replace the zip code (12345) and service info
(12345678901234567890).
Tip
You can find more information on EAN128Ex function at KB10048.