For an answer to the question, please see the following excerpt from our FAQ page.
Retail packaging is packaging that typically is filled with goods and offered to final consumers in this form. Service packaging and shipment packaging are also retail packaging.
Shipment packaging enables or facilitates the shipment of goods to final consumers.
Grouped packaging serves to bundle one or more articles of retail packaging and is typically offered along with the retail units to final consumers or is used to stock retail shelves.
If the grouped packaging typically accumulates as waste with private final consumers, it is subject to system participation and therefore also registration. This is a clarification contained in the Verpackungsgesetz (Packaging Act) vis-à-vis the Verpackungsverordnung (Packaging Ordinance).