What is the difference between a carrier shortage and a supplier short-ship?
A carrier shortage means the carrier delivered fewer pieces than the bill of lading shows it picked up, so the loss happened in transit and belongs to the carrier. A supplier short-ship means the vendor tendered fewer pieces than the purchase order called for, so the bill of lading is short and the gap belongs to the vendor.
Both look the same at the dock: fewer cartons than expected. The paperwork separates them, and it takes three documents.
The three-document test
Every inbound LTL shipment leaves three counts behind. Each one records a different moment and a different relationship.
- The purchase order (PO): what you bought. This is your contract with the vendor. Its quantity is what the vendor agreed to ship.
- The bill of lading (BOL): what the carrier took. Federal law requires a motor carrier to issue a receipt or bill of lading for the property it receives (49 U.S.C. 14706). Its piece count is the carrier's record of what the vendor handed over at pickup.
- The dock count: what came off the truck. This is what your receiver counts at delivery, and any gap against the bill of lading gets written on the delivery receipt before anyone signs it.
Two comparisons fall out of those three counts, and each one answers a different question:
- PO against BOL answers: did the vendor tender everything it sold you?
- BOL against dock count answers: did the carrier deliver everything it took?
Collapse them into one number (PO against what arrived) and the two kinds of shortage look identical.
How to read the result
Run the two comparisons in order and the outcome lands in one of four places. This works as a decision tree against your own paperwork.
1. PO, BOL and dock count all agree
Clean receipt. Nothing is short, and there is nothing to assign.
2. PO and BOL agree, but fewer pieces arrive
Carrier shortage. The vendor tendered the full order, the carrier signed for it at pickup, and something went missing between pickup and your dock. The gap is the BOL count minus the dock count, and it belongs to the carrier.
3. The BOL is already lower than the PO, and the dock count matches the BOL
Supplier short-ship. The vendor never tendered the missing pieces. The carrier delivered exactly what it received, so there is no carrier failure here at all. The gap is the PO quantity minus the BOL count, and it belongs to the vendor.
4. The BOL is lower than the PO, and the dock count is lower than the BOL
Both, on one shipment. Split the gap in two. The PO-to-BOL difference is the vendor's; the BOL-to-dock difference is the carrier's. As an illustration only: if a PO calls for 20 cartons, the BOL shows 18, and 17 come off the truck, 2 cartons are a supplier short-ship and 1 carton is a carrier shortage. Calling all 3 either one sends part of the gap to a party that does not owe it.
(If more pieces arrive than the BOL lists, that is an overage, a different problem covered in what OS&D means in freight.)
Why the order of the two checks matters
The two comparisons do not keep equally well.
The PO-to-BOL comparison is settled on paper. The vendor's bill of lading and your purchase order will say the same thing next week as they do today, so a supplier short-ship can be confirmed after the driver has gone.
The BOL-to-dock comparison is different. The delivery receipt is the carrier's record of what it handed over, and it is the document you sign at delivery, not the PO. A shortage belongs on that receipt, with the missing quantity, before you sign. A clean signature leaves the carrier's own record saying everything arrived.
So the tailgate count is always against the bill of lading. Checking received quantities against the PO line is a separate step inside receiving, and that is where a vendor short-ship surfaces. For the full receiving sequence, see how to receive an LTL shipment against a purchase order.
When the paperwork is not conclusive
The test is only as good as the counts behind it. Two situations can make a matching PO and BOL less certain than they look.
- The BOL counts a different unit than you do. A bill of lading that lists pallets can match at the pallet level while cartons on one pallet are short. That gap could be the vendor building the pallet short or the carrier losing cartons off it, and the BOL alone cannot tell you which. Count by line as well as by pallet, and compare against both documents.
- Who counted the pieces at pickup. The federal statute on bills of lading, 49 U.S.C. 80113, treats this differently depending on who loaded. When a carrier loads package freight, the section requires the carrier to count the packages. When the shipper loaded the goods and the bill is qualified with words like "shipper's weight, load, and count," the same section limits the carrier's liability for goods it never received. So check how the count on the bill was made before treating a matching PO and BOL as proof that every piece was tendered.
When the documents cannot settle it, capture everything you can at delivery (a count by line, photos, and the exact notation on the delivery receipt) so the question can be answered later.
Which party each one belongs to
Once the documents tell you which kind it is, the counterparty follows.
- A carrier shortage belongs to the carrier. The freight was in its possession when it went missing. Under 49 U.S.C. 14706, a motor carrier's liability under the bill of lading is for the actual loss or injury to the property that the carrier caused. The evidence is the BOL and the exception written on the delivery receipt.
- A supplier short-ship belongs to the vendor. The carrier never had the missing pieces, so there is nothing for it to answer for. This is a commercial matter between you and your supplier, governed by the purchase order and whatever your agreement with that vendor says. The evidence is the PO line and the vendor's own bill of lading.
- Both on one shipment means two parties. Each part of the gap goes to the party whose document shows it.
How to recover each one is a separate question with its own evidence and its own rules. That is covered in vendor chargeback or carrier claim.
Where LanePilot fits
LanePilot captures OS&D at the point of receiving, tied to the purchase order: each line that is over, short or damaged gets marked, with a required reason on the record. That is included in Warehouse Essentials. With LanePilot Warehouse, LanePilot drafts the vendor chargeback letter from a captured discrepancy, showing the PO, the expected quantity and what arrived. You review it and send it to the vendor yourself. LanePilot does not send, file or negotiate a chargeback, and it does not file or negotiate carrier claims. The receiving workflow in full is on the OS&D receiving for LTL freight page. LanePilot accounts are created at lanepilottech.com/signup.
This week's companion pieces cover the same question from other angles: The Shipper's Manifest looks at inventories building while warehouse staffing pulls back, and The Warehouse Workup walks through one delivery where both kinds of shortage landed on the same truck.
Frequently Asked Questions
Can a carrier shortage and a supplier short-ship happen on the same shipment?
Yes. If the bill of lading is lower than the purchase order and the dock count is lower than the bill of lading, both happened. The PO-to-BOL difference is the vendor's short-ship, and the BOL-to-dock difference is the carrier's shortage.
Should receivers count against the purchase order at the dock?
No. At delivery, count against the bill of lading and write any gap on the delivery receipt before signing. Checking received quantities against the PO line is a separate receiving step, and that is where a supplier short-ship shows up.
If the PO and the bill of lading match, is a missing carton always the carrier's?
Usually, but check how the bill's count was made. A pallet-level count can hide a carton shortage, and a count the shipper wrote under a notation like shipper's weight, load, and count may not reflect what the carrier verified at pickup.
Does LanePilot decide which kind of shortage it is or file the claim?
No. Your receiver marks the shortage against the PO line with a required reason, and LanePilot keeps that record. For a vendor short-ship, LanePilot Warehouse drafts a chargeback letter you review and send yourself. LanePilot does not file or negotiate carrier claims.