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Picking and Dispatch

Generating a dispatch challan

The dispatch challan is the document that sends goods out the door — and the moment your stock actually leaves. Here's the sequence that gets you there cleanly, and where the invoice fits in.

5 min read Updated July 2026

In Fast WMS, dispatch is deliberately the last step in a controlled outbound chain. By the time you generate a challan, the order has been picked, checked and packed — so the challan reflects exactly what is physically going on the vehicle. Dispatch is also the point where bin stock is decremented, so getting the earlier steps right keeps your inventory accurate.

From picklist to challan

  1. Confirm the picklist. Pick and scan-confirm the pallets against the order. This allocates the lots and deducts pallet quantity — see switching between FIFO and FEFO for how allocation is ordered.
  2. Checker-confirm. A checker verifies the pick and advances the picklist, adding a second pair of eyes before dispatch.
  3. Pack. Generate the packing slip and carton labels. Packing does not change stock.
  4. Allocate a driver. Assign a driver to the confirmed order so the dispatch is linked to who is carrying it.
  5. Dispatch. Create the dispatch entry. Fast WMS generates the delivery challan and the outbound delivery movement together, and decrements bin stock — the goods have now left.
  6. Print the challan. Print the delivery challan to travel with the vehicle.

Where the invoice fits

The tax invoice is a separate, financial step. It is raised from the un-invoiced dispatch balance and does not move stock — dispatch already did that. Keeping the two apart is deliberate: the challan governs the physical movement and the audit trail, while the invoice governs the accounting and GST. See the dispatch and invoicing feature for the full flow.

Remember: the challan drops stock, the invoice doesn't

Outbound stock leaves in two legs — pallet quantity at pick-confirm, and bin balance at dispatch. Generating the dispatch challan is the second leg, and it writes an immutable stock ledger entry. Invoicing is purely financial. If your stock looks wrong after billing, the cause is upstream at pick or dispatch, not the invoice.

Related articles
Dispatch & invoicing feature Switching between FIFO and FEFO FIFO & FEFO picking feature Mapping godowns to Fast WMS stores

Frequently asked questions

Does generating a dispatch challan reduce my stock?

Yes. Dispatch decrements bin stock as goods leave. The challan and delivery movement are created together and an immutable stock ledger entry is written.

Is the dispatch challan the same as the tax invoice?

No. The challan accompanies the goods and reduces stock. The tax invoice is raised separately from the un-invoiced dispatch balance and is financial only.

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