License Plate Number
An LPN (License Plate Number) is a unique identifier assigned to a handling unit such as a pallet, tote, case, carton, or internal container. In WMS/ERP systems, it is typically encoded as a barcode or RFID tag and linked to item number, quantity, lot, location, and status, enabling the unit to be tracked as one entity through receiving, storage, movement, picking, and shipping.
On the shop floor, an LPN is created when finished goods or raw materials are packed into a discrete pallet, tote, or carton. That identifier is scanned at each logical step—receiving, putaway, transfer, picking, staging, and shipping—so the system records the movement of the whole handling unit without requiring item-level scans of every loose part. This becomes particularly valuable for mixed or lot-controlled inventory: a single pallet LPN can hold a specific SKU quantity, batch/lot, and storage location in one record. The label can be printed or encoded for RFID, allowing receiving plants to identify the package consistently and avoid relabeling. In systems such as Sage X3, the LPN acts as a controlled internal-container identity with a status that moves from 'free' to 'in stock', supporting physical auditing, traceability, and controlled inventory transactions.
Is an LPN the same as a SKU, lot number, or container ID?
No. A SKU identifies the item type, a lot number identifies the production or traceability batch, and an LPN identifies the specific physical handling unit carrying stock. They are different levels of identification, and a WMS links the LPN to item, quantity, lot, location, and status.
Does an LPN persist after the pallet is broken down or fully used?
Typically no. When a handling unit is deconsolidated or completely consumed, the LPN is retired or consumed as part of the WMS lifecycle. Systems like Sage X3 track this through stock-associated status changes and use-date fields, so an empty or broken-down pallet does not retain an active license plate.
Why use LPNs instead of item-level scanning for every item?
LPNs reduce transaction volume by letting the system move, count, and confirm a whole pallet or tote as one unit. Receiving, putaway, cycle counting, and ship confirmation are faster because one scan captures the complete handling unit record rather than scanning each item individually.