Prior to shipment, the manufacturer or distribution center will scan Data Matrix codes of the shipped products and include them in the e-invoice. Upon receiving the goods, the buyer will sign the e-invoice. The data will be automatically entered into the labeling system and the Data Matrix codes will now belong to the buyer.
In the User Account, you can find the Documents section. On the Incoming tab, you will see the signed e-invoice and received Data Matrix codes.
To learn more about using an e-invoice, read Electronic invoices: how to choose an e-invoice operator with labeling support.