Moving stock to a new 3PL: reconciling the opening inventory

When moving stock to a new third party logistics provider, the opening inventory should be reconciled against what physically arrives, not simply what the previous warehouse says it dispatched. A successful transfer establishes an agreed starting balance for every SKU, including stock that is damaged, reserved or unavailable for sale. Without that baseline, discrepancies discovered weeks later become difficult to trace.

Set the inventory cutover before moving anything

Agree a clear cutover point when the outgoing warehouse stops changing the inventory being transferred. Outstanding customer orders, returns, stock adjustments and inbound deliveries need their own treatment. Otherwise, an apparently complete export can become inaccurate before the first vehicle leaves.

The outgoing provider should produce a stock snapshot showing SKU, description, quantity, unit of measure, batch or lot identification where applicable, and stock status. Both parties should agree which records represent the final transfer position.

For example, if 400 units appear in the warehouse system but 35 have already been allocated to accepted orders, the transfer plan must explain whether those orders will leave from the old site or whether all 400 units will move. That decision changes the opening balance.

Reconcile by SKU, batch and physical quantity

Goods arriving at the new warehouse should be checked against both the transfer manifest and the expected inventory file. Counting pallets alone is insufficient when pallets contain mixed products or quantities.

A practical receiving reconciliation should record:

• SKU and product description against the expected item master.
• Expected, dispatched and physically received quantities.
• Batch, lot, serial number or expiry details where relevant.
• Damaged, short, excess or unidentified stock.
• Stock placed in quarantine rather than available inventory.
• The person responsible for investigating each discrepancy.

Where a discrepancy appears, preserve the receiving evidence before making an inventory adjustment. Photographs of damaged packaging, pallet labels and signed receiving records can help establish whether the difference originated before dispatch, during transit or at receipt.

Keep disputed and quarantined stock outside available inventory

Physical arrival does not automatically make stock suitable for fulfilment. Damaged cartons, unidentifiable batches and products awaiting inspection should have a separate system status and an identifiable storage location.

For example, a pallet containing 120 units may arrive with 10 visibly damaged. The warehouse might physically receive 120, record 110 as available and quarantine 10 pending a commercial decision. Recording only 110 as received would conceal where the remaining units went.

This distinction becomes especially important when moving warehousing and fulfilment operations to a 3PL provider, because the new operation needs inventory records that support both customer orders and later investigations.

Test fulfilment before signing off the handover

Before releasing normal order volumes, run a small selection of test orders through allocation, picking, packing, dispatch confirmation and inventory deduction. Include a mixed SKU order and, where relevant, a product with batch control.

Compare the resulting transactions against the opening quantities. Check that unavailable stock cannot be allocated and that the remaining balance updates correctly.

Finally, produce a discrepancy register showing resolved differences, outstanding investigations and agreed adjustments. The outgoing warehouse, incoming provider and stock owner should confirm their respective figures and responsibilities.

The useful handover record is not merely a signed delivery note. It is a traceable opening inventory that explains what moved, what arrived, what customers can order and what still needs investigation.