Epson 4100 manual Check Digits

Operator's Guide E-15

PostNet Placement on a

Standard Business Envelope

AB0-AB

CHECK DIGITS

The check digit is optional for Code 39, Interleaved 2 of 5, and Codabar; if desired, the check digit should be supplied as part of the data according to the specifications of the code you are using. EAN-8 barcodes do not use check digits. The check digit for UPC-E and PostNet barcodes are automatically calculated and appended by the printer. For UPC-A and EAN-13 barcodes, a check digit is required, but it is not automatically calculated and appended by the printer. The last character is used as the check digit. See the table below.