The parcel number is an alphanumeric reference number with eight characters (e.g.: 00A6Z78A) or a set of eleven figures (e.g.: 36631234567)
If the sender has activated the FlexDeliveryService, you can find your parcel number in the e-mail or SMS that you received to announce your delivery time frame.
For deliveries without the FlexDeliveryService, check your order's confirmation e-mail sent by the sender.