What Is a BOL?
A BOL, short for bill of lading, is a legally binding document that travels with a freight shipment from pickup to delivery. It works as a receipt for the goods, a contract of carriage between the shipper and the carrier, and a document of title showing who can claim the freight.
Every less-than-truckload and full truckload shipment needs one. The BOL tells the driver what is on the trailer, a biller what to invoice, and a claims adjuster what condition the freight was in at pickup.
Mercer Transportation has moved more than 4,000,000 loads since 1977. Every one of them started with a bill of lading.
What Does a BOL Do?
A bill of lading performs three legal functions at once.
- Receipt of goods. It proves the carrier took possession of the shipment in the stated count and condition
- Contract of carriage. It sets the binding terms between the shipper and the carrier.
- Document of title. It establishes who can claim the freight when it arrives.
The title function is the one most people overlook. A negotiable BOL represents ownership itself, which is why banks and buyers treat it as a financial instrument rather than paperwork.
Federal law backs this up: motor carriers in interstate commerce must issue a bill of lading for property they accept under 49 CFR Part 373, and the Federal Bill of Lading Act governs how title passes.
What Information Goes on a BOL Form
A BOL form collects the details a carrier needs to move, rate, and invoice a shipment correctly.
| Field | Why it matters |
|---|---|
| Shipper name and address | Identifies the pickup location and the party responsible for the freight |
| Consignee name and address | Identifies who is authorized to accept delivery |
| BOL number | The reference number that tracks the shipment through the shipping process |
| Purchase order or reference number | Ties the shipment to the buyer’s paperwork so it is accepted at the dock |
| Ship date | Anchors the shipment for tracking and for reconciling the freight bill |
| Piece count and packaging type | Tells the carrier how many handling units are moving and how they are packaged |
| Description of goods | Vague descriptions get freight reclassified and rebilled |
| Weight and dimensions | Drives the rate. Understated weight triggers a reweigh. |
| NMFC freight classification | Determines the freight charges on LTL shipments |
| Special instructions | Site notes, gate access, appointment requirements |
| Accessorials | Liftgate, inside delivery, tarping, and similar services |
| Hazmat declaration | Required, and it must match the markings on the freight |
| Freight charge terms | Prepaid, collect, or billed to a third party |
| Signatures | Shipper, driver, and consignee |
BOL Number vs. PRO Number vs. Purchase Order Number
Three different numbers show up on the same shipping document, and shippers mix them up constantly.
- BOL number. Assigned by the shipper. It identifies the bill of lading itself.
- PRO number. Assigned by the carrier. It is the tracking number for the shipment inside the carrier’s system.
- Purchase order number. Assigned by the buyer. Receiving departments use it to match the delivery against what they ordered.
A shipment can carry all three at once. Keep them straight, and the freight gets accepted at the dock.
Who Fills Out the BOL and Who Signs It
The shipper usually creates the bill of lading. The carrier and the consignee sign it.
- Shipper. Prepares the BOL, sometimes with help from a freight forwarder or a third-party logistics provider. The shipper is responsible for the accuracy of what is on the form.
- Carrier. The driver inspects the freight, notes any damage or shortage, and signs at pickup. That signature confirms the shipping company took possession.
- Consignee. Inspects the shipment at delivery, notes any exceptions, and signs. That signature closes the chain of custody.
- Freight forwarder or 3PL. May prepare or review the BOL form before pickup.
The signature at delivery is the moment that matters most. Once a consignee signs a clean BOL, they have stated on a legal document that the freight arrived in good condition. Proving otherwise after the fact is difficult. Count the pieces, look at the packaging, and write down anything that looks wrong before signing.
How a BOL Moves Through the Shipping Process
The BOL follows the freight through five stages.
- Created at booking. The shipper fills out the BOL form, either on paper or as an electronic BOL.
- Signed at pickup. The driver inspects the load, notes exceptions, and signs. The document travels with the shipment.
- Rides with the freight. The BOL is the reference document for the load while it is in transit.
- Signed at delivery. The consignee signs. The signed document now works as proof of delivery.
- Returned to billing. The carrier uses the signed BOL to issue the freight bill.
BOL vs. Freight Bill vs. Packing Slip
These four documents get confused with each other. They are not the same thing.
| Document | Purpose | Who issues it |
|---|---|---|
| Bill of lading | Contract, receipt, and title document | Shipper |
| Freight bill | The invoice for freight charges | Carrier |
| Packing slip | Itemized list of what is inside the packaging | Shipper |
| Proof of delivery | Confirms the shipment was delivered and accepted | Carrier |
The freight bill comes from the BOL. If the weight, class, or accessorials on the BOL are wrong, the invoice will be wrong too. That single document is the record everyone downstream in the supply chain relies on.
One Team for Billing, Claims, & Paperwork
Mercer’s freight management services team manages the documentation side of every shipment, so billing, claims, and paperwork never land on your desk.
Types of BOL
The type of BOL depends on how the freight is paid for, who can claim it, and how it moves.
| Type | What it is |
|---|---|
| Straight BOL | Non-negotiable. Consigned to one named party and cannot be transferred. Used when payment is already handled. |
| Negotiable BOL | Also called an order BOL. Transferable by endorsement, so title can pass to a third party. Common when goods ship before payment clears. |
| Clean BOL | Signed by the carrier with no noted damage or shortage at pickup. |
| Master BOL | Issued by a carrier or shipping line to a freight forwarder, covering consolidated freight. |
| House BOL | Issued by the forwarder to each individual shipper under that master BOL. |
| Through BOL | Covers a shipment crossing multiple modes, common in intermodal shipping. |
| Electronic BOL | A digital BOL form. Faster tracking, fewer handwriting errors, and a clean audit trail. |
BOL Mistakes That Cost Shippers Money
Four BOL errors account for most of the money shippers lose on freight:
- A vague description of goods. “Machine parts” is not a description. Carriers reclassify freight they cannot identify, and reclassification changes the freight charges.
- Understated weight or dimensions. Carriers reweigh and remeasure. What you save on the quote comes back as a rebill.
- Accessorials left off the form. A handwritten note in the special instructions box does not get the right truck dispatched. Accessorials belong in the booking.
- Signing at delivery without noting damage. This is the expensive one.
How to Note Damage on a BOL Before You Sign
A freight claim is built on what is written on the bill of lading. Here is the chain:
- Damage or a shortage is spotted, either by the driver at pickup or by the consignee at delivery.
- Whoever spots it writes the exception directly on the BOL before signing.
- The signed BOL, with the exception noted, becomes the evidence.
- The claim is filed against the freight carrier with that document attached.
No notation, no evidence. A clean signature on a damaged shipment is one of the fastest ways to lose a claim.
Get Your Freight Moving with Mercer Transportation
The bill of lading is the backbone of the shipping process. It protects the shipper, the carrier, and the consignee, and it decides who pays when something goes wrong. Mercer Transportation has spent nearly 50 years getting freight and the paperwork behind it right. If you have freight to move, contact our team for a quote on our transportation services.
Paperwork Off Your Plate, Freight On the Road
Mercer’s freight management services team handles the paperwork, billing, and claims, so the documentation side of a shipment never lands on your desk.
If you arrange freight for a living, we also work with independent agents who already have their own book of business. See what a freight agent does and how teaming up with Mercer works!