I will use [collection method] and have an electronic order but no printing facilities. Must physical labels be attached in advance, or can the collecting party print them using an accepted order reference, and what needs confirming first? For a multi-piece shipment, how is each item matched to its label and who checks this at handover? I do not treat a phone screenshot as sufficient for shipment or label creation as carrier receipt, and am not including the full waybill or address here.