Overage, Shortage, and Damage (OS&D)

Overage, Shortage, and Damage (OS&D) is a freight industry term describing the three primary types of discrepancies found when a shipment is received and compared against its documentation. An overage means more units arrived than expected. A shortage means fewer units arrived. Damage means some or all of the goods are physically compromised. OS&D reporting is a standard part of warehouse receiving, carrier claims processing, and supply chain quality management. Accurate OS&D documentation protects importers, sellers, and logistics providers by establishing a clear record of what happened to the freight.

Overage

An overage occurs when the receiving warehouse counts more units than the purchase order, packing list, or bill of lading indicates. Common causes include supplier shipping errors (packing extra units by mistake), miscounts at the origin warehouse, or incorrect documentation where the packing list understates the actual quantity.

While receiving more than expected might seem like a benefit, overages create operational and financial complications. The extra units may not have corresponding customs entries (meaning duties were not paid on them), they may not fit the warehouse’s allocated storage plan, and they complicate inventory reconciliation. The receiving party must document the overage, notify the shipper or supplier, and determine whether to accept, return, or hold the excess units pending resolution.

Shortage

A shortage (or short shipment) is the more common and more problematic discrepancy. The receiving warehouse finds fewer units than the documentation indicates. Shortages can originate at several points in the supply chain:

At the supplier. The factory packed fewer units than invoiced. This might be an honest counting error or a deliberate short-ship to meet a deadline when production fell behind.

During transit. Cartons fell off a pallet during ocean transit, were lost during transshipment, or were separated during deconsolidation. Pilferage (theft) during handling at ports or terminals is another cause, though less common with sealed containers.

At the warehouse. Receiving errors where units are miscounted, scanned incorrectly, or placed in the wrong bin location create apparent shortages. A physical recount or bin audit may resolve these discrepancies without an actual loss.

Documenting the shortage immediately upon receiving, including photographs and detailed counts, is essential for filing carrier claims or supplier disputes. Carriers require shortage claims to be filed within specific time frames (9 months for ocean carriers under COGSA, 9 months for domestic motor carriers under the Carmack Amendment).

Damage

Damage refers to any physical harm to the goods or their packaging that occurred during transit or handling. Common types of freight damage include water damage (from container condensation, rain exposure, or vessel flooding), crush damage (from improper stacking or shifting cargo), temperature damage (for perishables or products sensitive to heat), and contamination (from chemical leaks, pest infestation, or proximity to incompatible cargo).

Damage assessment at receiving involves documenting the type and extent of damage, photographing affected units, and determining whether the product is still salable, requires repair, or is a total loss. For FBA-bound inventory, even minor packaging damage may make units unacceptable under Amazon’s receiving standards, requiring repackaging or disposal.

The OS&D Report

A formal OS&D report (sometimes called a discrepancy report or exception report) is created during the receiving process. The report includes: the shipment reference numbers (PO, BOL, container number), expected versus actual quantities, a description of any damage with photographs, the names and signatures of receiving personnel, and the date and time of the inspection.

This report serves multiple purposes. It is the basis for carrier claims against the transportation company. It supports insurance claims if the shipper has cargo insurance. It provides evidence for supplier negotiations about credits, replacements, or refunds. And it updates inventory records to reflect the actual quantity available rather than the expected quantity.

Minimizing OS&D

Proper packaging, accurate documentation, and reliable carriers reduce OS&D rates. Sellers should require their suppliers to use packaging that meets ISTA (International Safe Transit Association) standards for the applicable transport mode. Verifying quantities through pre-shipment inspection at the origin factory catches shortages before the container is sealed. Using carriers with strong claims ratios and investing in cargo insurance provides financial protection when discrepancies do occur.