Native EDI, UCC-128 carton labels, and chargeback-prevention audit logs on every PO into Saks, Nordstrom, REI, Walmart, and Target.
What retail fulfillment covers
Retail fulfillment failure modes are almost always compliance failures, not pick-pack failures. The five workflows below run on every retail PO at Vertex. Each one is owned internally; we do not outsource EDI mapping or UCC-128 templates to a black-box VAN.
The four EDI transactions retail compliance requires, run natively on our side. 850 is the retailer's purchase order. 855 is our acknowledgment with committed quantities, ship dates, and exceptions. 856 is the advance ship notice (ASN) that has to land in the retailer's system before the trailer arrives at the DC. 810 is the invoice. Certified trading partners with TrueCommerce, SPS Commerce, and GXS.
Every retailer requires the UCC-128 (also called GS1-128) shipping label on the outside of each carton with the retailer's vendor prefix encoded in the SSCC. Per-retailer template library: Target wants the SSCC at a specific position, Walmart enforces label dimensions to the millimeter, Nordstrom enforces the human-readable text block format. The WMS prints the correct template based on the destination retailer code.
Most retailers require the EDI 856 ASN between 1 and 24 hours before the trailer hits their DC. Miss the window and the trailer gets turned away, you eat the freight, and the retailer charges back. We time the ASN send against the trailer dispatch time, not against the pack-complete timestamp, so the window always lines up. For same-day-ASN retailers (Target on certain lanes), we send within 60 minutes of dock departure.
Every retailer publishes a routing guide specifying which carriers handle which lanes (LTL, parcel, full-truckload), which booking portal to use, the BOL format, and the chargeback schedule for non-compliance. We read every routing guide for every retailer your brand ships to and enforce the routing rules in the shipping logic. When a routing guide updates (Macy's did three times in 2024), we update the rules and notify your account manager the same week.
Non-compliance chargebacks (late ASN, wrong carrier, missing UCC-128, incorrect carton-count on the PO) can stack up to a meaningful percentage of invoice value, more for repeat offenders. We surface every potential chargeback risk in your account dashboard before the order ships, with a written audit log of why each compliance check passed. If a chargeback hits anyway, you have the documentation to dispute it.
Who this service is for
Retail fulfillment fits brands shipping B2B to one or more national or regional retailers under EDI-based PO flow. Below are the four profiles we run for most often.
Has been Shopify-only for 2 to 4 years, just got into Saks, Nordstrom, REI, or a regional retailer. First retail PO is in 6 to 10 weeks and the brand has never run EDI, UCC-128, or an ASN window. Needs a 3PL that handles the compliance side so the founder can focus on product, not BOL formats.
Already running DTC and Amazon at scale, signed with Target, Walmart Vendor, or both. Needs the EDI integration, vendor-prefix logic for UCC-128 carton labels, and the chargeback-prevention workflow. Cannot afford 8% margin compression from compliance failures.
Sells through KeHE, UNFI, or a regional distributor, plus direct PO from chain retailers (Whole Foods, Sprouts, regional grocery). Needs EDI compliance at the distributor level plus the carton-label and ASN logic for the direct retail accounts.
Has been shipping retail with another 3PL and is bleeding margin on chargebacks. Switching costs are real but the math has flipped. Needs a 3PL with an audit log on every retail order and a written compliance check before each PO ships.
What goes wrong at non-retail-native 3PLs
A chargeback is a margin loss the brand never sees coming until the retailer statement lands 60 days later. Below are the five failure modes we hear about every week from brands switching off a 3PL that ran retail as a side-business.
The 3PL says they support EDI and what they mean is they pay TrueCommerce or SPS Commerce to do the mapping and they have no internal expertise. When the retailer changes their EDI spec (Walmart Vendor did twice in 2024), the 3PL waits 4 to 8 weeks for the VAN to re-map. During that gap, the brand's POs get rejected with no clear cause and the chargebacks pile up.
The 3PL prints one UCC-128 template for every retailer. Target rejects because the SSCC is in the wrong position. Walmart rejects because the label dimensions are off by 2mm. Nordstrom rejects because the human-readable text block does not match their format. Each rejection is a chargeback. Cheap setups discover this after the third PO of the season.
The 3PL sends the EDI 856 ASN when the order finishes packing, not when the trailer actually dispatches. If the trailer sits at the dock for 14 hours waiting for the carrier, the ASN is now 14 hours stale and may fall outside the retailer's window. Miss the window, the retailer turns the trailer away, the brand eats the freight. We time the ASN against trailer dispatch every time.
The 3PL reads the retailer's routing guide during the initial setup, configures the carrier and BOL format, and never looks at it again. When the retailer publishes a routing-guide update (most do quarterly, some monthly), the 3PL keeps shipping under the old rules. Chargebacks for non-compliant carrier selection start landing 2 to 6 weeks later.
A chargeback shows up on the retailer statement 60 days after the PO. The 3PL says "we shipped on time" but cannot produce the EDI 856 send-time, the BOL signature, the seal photo, or the routing-guide version they shipped against. The brand has no documentation to dispute the chargeback. Dispute window closes. The margin loss is permanent.
How we run retail fulfillment at Vertex
An EDI 850 purchase order lands in our WMS from the retailer's VAN (SPS Commerce, TrueCommerce, or GXS depending on the retailer). The 850 contains the PO number, line items with retailer SKU codes mapped to your internal SKU IDs, requested ship dates, must-arrive-by dates, ship-to DC address, and routing instructions. The WMS validates every field against your master compliance profile for that retailer and flags any mismatches (out-of-stock at the line level, MABD that conflicts with carrier transit time, ship-to DC not in the routing guide) before the PO enters the pick queue. Mismatches generate an EDI 855 with the exception detail, sent back to the retailer within the acknowledgment window (typically 24 hours).
Pick wave assembly for retail POs is different from DTC. Retail POs are bulk picks (typically full cases or master cartons), pre-allocated against bin location at the wave-build stage, and assembled to retailer-spec pallet patterns. The pick associate scans the SKU at the bin, scans the destination master carton, and the WMS records the assignment. Master cartons get the UCC-128 / GS1-128 carton label printed at the pack station from the retailer-specific template library. Target wants the SSCC at a specific position on the label. Walmart enforces label dimensions to the millimeter. Nordstrom enforces the human-readable text block format. We maintain a per-retailer template library and the WMS prints the correct template based on the destination retailer code on the PO.
BOL (bill of lading) generation runs against the retailer's routing guide. Every retailer publishes a routing guide that specifies which carriers handle which lanes, which booking portal to use, the BOL format, and the chargeback schedule for non-compliance. We read every routing guide for every retailer your brand ships to and enforce the routing rules in our shipping logic. When a retailer updates the routing guide (Macy's did three times in 2024, Walmart Vendor did twice), we update the rules and notify your account manager the same week. The BOL gets generated from the retailer's exact template, with the correct carrier name, BOL number format, and consignee data.
EDI 856 advance ship notice timing is the single most chargeback-prone step. The 856 has to land in the retailer's system inside a specific window before the trailer arrives at the DC. Saks: 24 hours. Nordstrom: 12 hours. Target: 1 hour on certain lanes (tightest in retail). Walmart: 2 hours. Most 3PLs send the 856 at pack-complete timestamp, which means if the trailer sits at the dock for 8 hours waiting for the carrier, the 856 is now 8 hours stale and the brand burns half the window before the trailer even moves. We time the 856 against the trailer dispatch time, not pack-complete. The WMS holds the 856 send until the dock manager confirms trailer departure, then fires it inside the retailer's window.
Dock seal capture, BOL signature, and trailer handoff happen with the dock manager present. The seal number gets photographed and logged against the manifest. The carrier driver signs the BOL on a tablet that captures timestamp, GPS coordinates, and the driver's signature. Chain-of-custody is documented from the seal photo through the carrier's first scan. When a parcel goes missing or a chargeback dispute lands, we have the documentation. Brands switching to us from a 3PL that did not run this discipline find that chargeback dispute outcomes improve materially when the audit log is complete.
EDI 810 invoice generation fires after delivery confirmation, with the line-item detail matching what shipped (not what was ordered, which can differ if a line was short or substituted). The 810 ties back to the original 850 PO number, the 856 ASN, and the delivery confirmation. Retailers can match all four documents before approving payment, which speeds the payment cycle and reduces dispute risk. The retail fulfillment dashboard in your account surfaces every active PO, the compliance status at each EDI step, the ASN-window countdown for in-flight trailers, and the chargeback exposure flag. If a chargeback hits anyway, the audit log gives you the documentation to dispute.
Retailer compliance, by retailer
Scroll the cards below for the specific EDI, ASN, label, and routing-guide rules at each retailer. Every retailer has a quirk; below is the one that causes the most chargebacks at each.
The quirk
Saks is one of the strictest on UCC-128 placement. Vendor prefix typos are an automatic chargeback.
The quirk
Nordstrom enforces the human-readable text block format more strictly than peers. Mismatched format triggers a chargeback even if the barcode scans correctly.
The quirk
REI requires sustainability-claim documentation alongside the EDI submission for products marketed as recycled or low-waste. Missing documentation is a chargeback.
The quirk
Walmart's OTIF program charges back if you miss the must-arrive-by date or ship-short. Compliance below 87.5% triggers vendor performance review.
The quirk
Target is the only major retailer with same-day ASN on certain lanes. Miss the 1-hour window and the trailer is refused at the DC.
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Pricing snapshot
Retail-specific pricing below. Routing-guide enforcement, ASN window management, and chargeback-prevention audit log are included in the retail SOW with no surcharge.
Retail PO pick
Custom
per unit, bulk-pack to retailer spec
UCC-128 label
Custom
per carton, per-retailer template
EDI per transaction
Custom
850, 855, 856, 810 included
ASN window mgmt
$0
no surcharge, included in retail SOW
Where this service runs
Retail fulfillment runs from every Vertex facility, with retailer-specific routing-guide enforcement at each node. Brands shipping to multiple retailer DCs across the country typically benefit from multi-node setup, because the transit time savings on LTL freight reduce MABD chargeback exposure significantly.
For brands shipping primarily to a single retailer with consolidated DC inbound (Walmart at Bentonville, Target at Minneapolis), single-node setup works fine. The discovery call covers which node profile fits your retailer mix.
Ready to ship compliant retail POs?
EDI 850 / 855 / 856 / 810 native. UCC-128 carton labels per retailer template. ASN window timed against trailer dispatch. Chargeback-prevention audit log on every PO. Compliant POs shipped to Saks, Nordstrom, REI, Walmart Vendor, and Target.
