You may seal your WARENPOST items before posting them. Deutsche Post is, however, permitted to open them for inspection purposes.
Items are to be posted at Deutsche Post retail outlets or bulk mail acceptance offices. Shipments can also be put in the letterbox in Germany, maximum 20 pieces (depending on the size of the shipment). Warenpost items may not be posted at Packstations or parcel shops or be handed over to a parcel carrier.
Larger volumes of Warenpost items are to be posted or held for collection separately from other items and separated into items <3 cm and >=3 cm thick. Mail trays or mail tray carts, if used, must always be properly labeled.