Know which unit
each customer received.

Turn on Require Serial Number for the product. From then on, the packer scans or enters a serial number for every unit of that product before the shipment can be completed, and Fulfil records each serial on the shipment. To find a unit later, search the serial number under Inventory & Stock > Serial Numbers.

Yes. Search the serial number and the result links to the customer shipment and the sales order, so your support team can see the order details, ship date, and delivery address. This is the usual starting point for a warranty claim or a support call where the customer reads the serial off the label or receipt.

A lot number is an inventory concept. It groups units from the same production batch, and every receipt, pick, transfer, and cycle count records which lot moved, so you can manage expiry and recalls. A serial number is a shipment traceability concept. It identifies one unit and is recorded when that unit is packed. Serial numbers do not change inventory counts, receiving, or picking.

Yes. They are independent settings. Lot tracking controls how inventory is received, stored, and picked. Serial tracking adds the scan at packing. Use both when you need batch-level control and need to know exactly which unit each customer received.

Yes. Receiving, putaway, picking, cycle counts, and bin transfers work exactly as they do today. The only added step is at packing, where the packer scans or enters the serial for each unit.

Yes. Fulfil sends the shipment to the 3PL as usual, the 3PL scans serials in its own warehouse system during packing, and returns them with the tracking number in its shipping confirmation. Fulfil records the serials on the shipment automatically. If a 3PL does not return serials, the shipment still completes without them, so confirm your 3PL captures serial numbers before go-live.

Yes. Open the customer shipment in Fulfil, expand the line, and add serial numbers in the Serial Numbers section.

Fulfil rejects it. Each serial number must be unique on a shipment line.

It adds one scan or entry per serialised unit. If the barcode encodes both the SKU and the serial number, one scan captures both. You turn serial tracking on per product, so you can serialise only the SKUs that need it.