WFS Prep Requirements: A Seller’s Inbound Checklist

Walmart Fulfillment Services inventory must match an active shipping plan, carry the correct unit and receiving labels, and arrive in packaging that protects the product through receiving, storage, and delivery. Product-specific rules apply to liquids, fragile items, batteries, sets, poly bags, heavy items, master cases, and pallets.

Use this checklist before releasing a shipment:

• Create the WFS shipping plan before sending inventory.
• Confirm every SKU and quantity matches the plan.
• Put a readable GTIN or UPC barcode on the outermost packaging of each sellable unit.
• Apply the current WFS receiving label to every master case or pallet.
• Keep carrier labels separate from WFS receiving labels.
• Seal and protect each unit so it is ready for sale.
• Apply category-specific prep for liquids, fragile products, batteries, sets, loose items, and poly bags.
• Use approved boxes, dunnage, pallet construction, wrapping, and label placement.
• Recheck the shipping plan immediately before pickup in case assignments or labels changed.

Walmart’s current WFS guidance and the instructions shown in Seller Center remain the source of truth for each shipment.

A WFS shipping plan tells Walmart what inventory is coming, how it is packed, how it will travel, and when it should arrive. Walmart’s domestic inventory guide says sellers must create a plan before sending items; inventory without one may be delayed or rejected during check-in.

Before final labeling, verify:

1. The correct SKUs and unit quantities are in the plan.
2. Master-case and pallet details match the physical shipment.
3. Each shipment tab has the correct carrier and shipping method.
4. The packing list matches the units inside each box.
5. Receiving labels were downloaded from the final version of the plan.

Do not treat an old label file as reusable. If the plan changes, download and print the current labels again.

WFS uses different labels for different jobs.

Item label: Every sellable unit needs a visible and scannable GTIN or UPC barcode on its outermost packaging. Walmart’s labeling guide says the barcode must remain visible and scannable when the unit is removed from its shipping box.

Receiving label: Every box or pallet needs the WFS receiving label generated from the shipping plan. This is not the carrier label. It helps the fulfillment center connect the container to the correct inbound shipment and contents.

A reliable label check confirms the marketplace, SKU, barcode source, shipment ID, box or pallet ID, placement, and scan quality. One generic instruction to “apply a barcode” is not enough.

Walmart says WFS items must be protected in a sealed or closed container, ready for sale, and packaged to contain the item during transit. Packaging must also protect carriers, warehouse associates, and customers from safety hazards.

The prepare-and-pack guide details category-specific requirements. Common checks include:

• Liquids and powders: Use leak-resistant preparation appropriate to the product. A sealed opening, shrink wrap, or a poly bag may be required.
• Fragile products: Use rigid protective packaging that prevents exposure and breakage during fulfillment.
• Sharp items: Cover and contain every sharp or pointed edge throughout handling and delivery.
• Batteries: Prevent short circuits, protect terminals, and apply required transportation markings without covering them.
• Sets: Seal the pieces together and clearly identify the package as one sellable set.
• Loose items: Secure every unit within one package so pieces cannot separate.
• Valuables: Use sealed, tamper-evident packaging with a scannable barcode on the outer packaging.
• Heavy items: Follow the pallet workflow when the product or freight method requires it.

For poly bags, Walmart’s current guide requires a visible suffocation warning when the opening is five inches or larger. The bag must be sealed, and the GTIN or UPC must be scannable through the bag or placed on the outside.

A master case has to survive freight and be easy for WFS to identify and receive. Walmart’s master-case guidance lists accepted case construction, weight limits, lift markings, receiving labels, and packing materials.

Before sealing a case:

• Use a clean, structurally sound box suitable for the load.
• Remove old labels and markings from reused cartons.
• Keep prohibited loose fill and damaged dunnage out of the case.
• Confirm the physical contents match the WFS packing list.
• Apply the receiving label where scanners can detect it.
• Add the required lift labels to qualifying oversized single-unit cases.
• Apply Walmart’s prescribed STOP labels to mixed-SKU cases.

A box can be safe for a parcel carrier and still be wrong for fulfillment-center receiving. Check both requirements.

Walmart’s pallet requirements apply to LTL and FTL shipments, with additional distinctions for drop trailers and live unloads.

For a standard single pallet, current guidance calls for a 40-by-48-inch, four-way-access, solid-wood pallet in good condition. Walmart also specifies maximum weight and height, load stability, stretch-wrap technique, and receiving-label placement. Nonstandard oversized units may require a different pallet, but the seller must confirm carrier acceptance.

The final pallet check should verify:

• The pallet type and condition meet the current guide.
• Cases do not create unsafe overhang or unstable weight distribution.
• Stretch wrap secures the load without blocking forklift access.
• Receiving labels sit outside the wrap and are visible from every required side.
• Mixed items are physically separated and easy to identify.
• The bill of lading, appointment, and carrier details match the shipping plan.

A repeatable WFS prep process should stop errors before pickup. Use this order:

1. Plan check: Confirm the shipment destination, SKUs, quantities, carrier, and packing method.
2. Unit check: Verify condition, packaging, barcode identity, placement, and scan quality.
3. Case check: Match contents to the packing list and confirm receiving labels and required warnings.
4. Pallet check: Verify construction, dimensions, weight, stability, wrapping, and labels when freight is used.
5. Exception check: Photograph and record shortages, damage, relabeling, substitutions, or repacking.
6. Release check: Compare the sealed shipment to the final Seller Center plan before pickup.

This sequence separates inventory decisions from physical prep and creates a record when supplier inventory does not match the plan.

Common WFS Prep Mistakes

• Sending inventory before creating the shipping plan
• Using an unreadable or covered unit barcode
• Confusing a carrier label with a WFS receiving label
• Printing labels before the final box or pallet assignments are set
• Mixing SKUs without the required carton identification
• Using packaging that cannot contain liquids, sharp edges, or fragile products
• Covering battery or hazard markings with another label
• Reusing cartons without removing old labels
• Building an unstable or noncompliant pallet
• Skipping a final scan and quantity check

Walmart notes that noncompliant inventory may be delayed, corrected for an additional fee, returned, rejected, or otherwise handled according to the issue. The safest approach is to correct exceptions before the shipment leaves your control.

When a WFS Prep Center Helps

A prep center can receive supplier inventory, inspect units, apply marketplace-specific packaging and labels, build master cases or pallets to the active shipping plan, document exceptions, and coordinate outbound freight.

Rocket Packaging provides Walmart WFS prep services from Houston, including labeling, poly bagging, bundling, box prep, quality control, and shipment coordination. The goal is a documented, repeatable inbound workflow—not simply printing labels.

If you are deciding between marketplace networks, read Amazon FBA vs. Walmart WFS Prep before splitting inventory.

Prepare the Shipment Once—Correctly

The lowest-risk WFS inbound process uses one final shipping plan, marketplace-specific work instructions, scannable labels, documented quality checks, and a controlled release before pickup.