3PL Inventory Adjustments and Shrinkage: What Buyers Should Define
A buyer’s framework for controlling 3PL inventory adjustments, investigating shrinkage and reconciling physical and system stock.
Before choosing a 3PL, define who can post inventory adjustments, which reason codes are permitted, what evidence is required and when a variance triggers investigation. A general promise of “accurate inventory” is not a control. Buyers need a repeatable process that reconciles physical stock, the warehouse management system and the brand’s system of record.
247 Fulfillment’s inventory management service page describes live visibility, lot and expiry tracking, serial tracking, bin-level control and inventory status. Those capabilities provide useful data, but the operating rules still determine how exceptions are investigated and recorded.
Not every inventory change is shrinkage
Start by separating three events. A status move changes inventory from available to quarantine, damaged or allocated without changing total physical quantity. A quantity adjustment changes the system quantity to match verified evidence. Shrinkage is an unexplained or confirmed loss in physical inventory; it should not be used as a catch-all label for receiving corrections, damage or customer returns.
| Adjustment type | Example | Minimum evidence |
|---|---|---|
| Receiving variance | Count differs from supplier document | Receipt ID, count record, photos or seal detail when relevant |
| Damage or expiry | Units moved out of available stock | SKU, quantity, reason, condition evidence, disposition approval |
| Found stock | Units located in another bin | Old and new locations, count confirmation |
| Count variance | Physical count differs from WMS | Initial count, recount, counter identity, transaction review |
| Return correction | Customer return disposition changes quantity | Return ID, inspection result, restock or disposal status |
| Write-off | Loss confirmed after investigation | Investigation record and authorized financial disposition |
Control who can post an adjustment
Ask the provider for role-based authority. The person who discovers a variance should not necessarily be the only person who approves a material write-off. A practical design can allow small routine corrections by trained inventory staff while requiring a second approval for higher quantities, higher value, regulated goods or repeated variances on the same SKU.
A threshold is not blanket permission to lose inventory. It defines workflow. For example, a one-unit correction may require a reason code and recount, while a larger variance may require transaction review, location search, receiving or shipping evidence and brand notification before posting.
Require an adjustment register
The provider should be able to export a register that includes adjustment ID, date and time, facility, SKU, lot or serial where relevant, quantity before and after, reason code, bin, related receipt/order/return, user, approver, evidence reference and investigation status. The brand should receive the register on a defined cadence and be able to request underlying records.
Do not accept free-text reasons such as “correction” as the main classification. A controlled reason-code list makes patterns visible. Free text can explain the event after the category is chosen.
Worked example: net variance can hide activity
Hypothetical example in CAD. A brand has 15,000 units across 40 SKUs. During one month, the register shows 42 units removed after count variances, 17 units added as found stock, nine damaged units written off and six units removed to correct a receiving shortage.
| Event | Unit movement | Hypothetical unit cost | Financial effect |
|---|---|---|---|
| Count variance | -42 | $18 | -$756 |
| Found stock | +17 | $18 | +$306 |
| Damage write-off | -9 | $22 | -$198 |
| Receiving correction | -6 | $14 | -$84 |
| Total | -40 net units | — | -$732 |
The net change is 40 units, but gross absolute movement is 74 units: 42 + 17 + 9 + 6. Reporting only the net can conceal repeated losses and finds. Review both net financial impact and gross adjustment activity, then investigate by SKU, location, reason and process step. This example is not an industry benchmark or an acceptable-loss standard.
Set investigation and communication rules
Define when the 3PL must notify the brand, when inventory should be quarantined, the time allowed for initial evidence and final findings, and who decides financial treatment. The process should also cover suspected theft, repeated location variance, lot or serial mismatch, and discrepancies discovered during a cycle count or stock transfer.
Liability and insurance answer a different question: who bears a confirmed loss and how a claim is supported. Use the 3PL inventory-loss checklist for that layer. For export access, retention and field definitions, use the reporting and data-access guide.
Buyer checklist
- Which events are status moves versus quantity adjustments?
- Who can create, approve and reverse an adjustment?
- Which reason codes and evidence are mandatory?
- What thresholds trigger recount, investigation and brand approval?
- Can the brand export a complete adjustment register?
- Are lot, expiry and serial attributes preserved through corrections?
- How quickly are material or repeated variances reported?
- How are confirmed loss, damage and supplier shortage treated financially?
When evaluating inventory controls, provide your SKU attributes, product values, lot or serial needs and system-of-record requirements with your 247 Fulfillment quote request. The goal is not a generic shrinkage promise; it is an auditable process suited to your inventory.
