Shipper Load and Count
Shipper load and count (SLAC) is a bill of lading notation stating that the shipper loaded and counted the freight without the driver verifying the quantity, typically used on sealed truckloads and containers.
Why it matters for ecommerce brands
SLAC shifts the burden of proving shortages to the shipper, so a short count at delivery is hard to claim against the carrier if the seal was intact. Keep load photos, seal numbers, and loading records.
Common questions
- What does SLAC mean on a bill of lading?
- It means the shipper loaded and counted the goods and the driver did not verify the piece count. If the trailer arrives with the original seal intact and the count is short, the carrier is usually not liable for the shortage.
Cite this entry
"Shipper Load and Count (SLAC)." Fulfillment Lexicon, last reviewed October 16, 2026. https://fulfillment.wiki/glossary/shipper-load-and-count/