The Italian Postal 2/5 code is encoded using Interleaved 2 of 5 symbology, except that the check digit is calculated using a different algorithm from that used by normal Interleaved 2/5.
Italian Postal 2/5
The code consists of
eleven digits
one check digit
The dLSoft library calculates the check digit when required, and inserts a dash or a space between the components of the code. A dash is normally inserted, but a space may be inserted by checking the EXTRA1 checkbox in applications, or setting the flags parameter bit DL_FLAG_EXTRA1 (bit 4 of the flags variable). The data may be supplied without a space/dash.
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