To ensure smooth reconciliation between your PostFinance transactions and your bank statements, the following rules are applied for the structured communication for Netbanking applications:
If the field OrderID contains 12 digits and corresponds with the structured communication format (modulo 97), then this reference will be used as structured communication.
If the field COM contains 12 digits and corresponds with the structured communication format (modulo 97), then this reference will be used as structured communication.
If the field OrderID contains 10 digits or fewer, PostFinance will add the 2 last digits (according to the rules for structured communications modulo97) and pad with zeros, if needed, to make the OrderID 12 digits long.
When none of the above cases applies, PostFinance will use the unique PayID as the basis for a 12-digit structured communication (modulo 97) padding empty spaces with zeros.