Target code A034: Unit Shortage / Case Pack
Target code A034 is a unit or case-pack shortage: the carton count was right but the units inside did not match what Target expected, usually because the case pack on file differs from the case pack shipped.
A pack-size mismatch between Target’s item record and the shipment, an inner-pack change that was never loaded on Target’s side, or genuine short-packing at the co-packer.
Recoverable when the pack change was communicated and Target did not load it. A pack-size disagreement is a data problem and the item record usually shows which side is stale.
Evidence that settles a A034 dispute
Most decisive first. A dispute filed without the first item on this list rarely survives review.
- 1 Item setup record showing the case pack Target has on file
- 2 ASN (EDI 856) with pack and inner-pack detail
- 3 Pack-out or co-packer records for the production run
- 4 Any accepted item maintenance changing the case pack, with its effective date
How to stop code A034 recurring
Case-pack changes are the single most common cause. Treating a pack change as an item-data event that has to be accepted by the retailer before the first shipment stops the mismatch at the source.
Target’s A-codes are matching failures: the invoice, the ASN, and the purchase order describing three slightly different shipments. Endless keeps all three on one order record, so they cannot drift, and EndlessEDI builds carton-level 856s from the actual pack. Brands on Endless report a 90% drop in retailer EDI chargebacks.
- Where to dispute
- Chargebacks surface in Target’s vendor systems and are disputed through Partners Online and Synergy, with supporting documentation attached to the claim.
- Dispute window
- Most Target chargebacks are reported to be disputable for 12 to 18 months from the issue date. Compliance and performance charges, including OTIF and ASN violations, are reported to carry shorter windows, sometimes as little as 90 days.
Related Target codes
Deduction programs and dispute windows change and vary by vendor agreement. Figures marked “reported” come from third-party supplier resources, not a retailer’s published fee schedule — confirm against your current routing guide and supplier agreement before you file. See every Target deduction code .

See it on your channels.
Spend your time on the business, not the busywork. Book a demo and watch Endless run your operations across every channel you sell on.
Get a Demo