When a UBL is imported on the platform and its due date is prior to the billing date, 2 behaviors will be adopted by the system depending on whether a default due date has been configured or not.
The supplier has been assigned a default due date
If the supplier has been assigned a default due date, it'll be used to replace the original due date.
To assign a default due date to a supplier:
Go to the Customers & Suppliers menu
Go to the Suppliers tab
Click on a supplier
From the Default due date dropdown menu, choose a value to assign it to your supplier
Save.
The supplier has
not
been assigned a default due date
If no due date has been assigned to a supplier, then the invoice date will also be used as the due date.