The UK Postal Service is promoting the use of a 4 State barcode to speed mail sorting.
This 4 State barcode encodes a variable number of digits and letters and has a checksum appended to the data.
You must make sure you give the correct digits and letters to the BarDIMM, and BarDIMM will calculate and print automatically the checksum.
Need more help with this?
BarDIMM support portal