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by DecoPerson 3658 days ago
Australia Post calls them "consignments."

All articles belong to a consignment, and a consignment has one or more articles. There are dozens of services, the most used is eParcel which goes: Consignment #: ABC1234567 Article #: ABC123456789123456(09999)

Both include check digits, and the extra (09999) is the destination post code so it can still be routed in cases where the address info is damaged and the central servers are not available.