Method and system for applying customer-specific labels to unprinted side of printed products

A method for applying customer-specific labels to an unprinted side of printed products includes receiving a product design identifier corresponding to a customer's customized product design, printing the customer's customized product design in a no-trim area on a substrate, printing the product design identifier associated with the customer's customized product design on the substrate in an area outside the no-trim area, and prior to trimming away the no-trim area, scanning the identifier and printing a corresponding label containing customer order information and affixing the label to a different side of the substrate within the no-trim area of the printed design. In the printing step, individual customer designs of multiple items (for example posters) are simultaneously processed by the printing system as a composite print job. The single items are then created by cutting, and each item carries the corresponding label.