During the online order procedure, in the first step 'Address,' you will be able to insert your company's order number or PO number. If at that point you do not have it yet, you can still finish your online order and confirm it.
As long as you do not pay the order, we are always able to insert information into the proforma invoice as the order remains 'pending' awaiting its payment. Once you have your PO number, contact us via email@example.com and request to insert the PO number to your proforma invoice PFXXXXXX.
Once the payment is registered in our system, the proforma invoice gets automatically transformed into a final invoice.
Both, the proforma invoice (before the payment) and the final invoice (after payment), are downloadable from the MyKNX account where the order has been placed under Account > Orders.