If you have been notified regarding a shipment loss/damage, you can proceed to submit a claim by proceeding directly from the order in question.
Directly from the portal MENU, under MY ORDERS, by selecting the order in question, you can submit a request to proceed with a claim for damage/loss of the shipment by clicking on OPEN CLAIM, available in the option ACTIONS.
Just fill in completely the form, carefully selecting the reason of the claim and attaching all the required documents: