EDI 850, 855, 856, 810 — the four documents that run wholesale

EDI has a reputation for being arcane, and the X12 standard doesn't help — but the day-to-day of wholesale trade runs on just four documents. If you understand these, you understand 90% of what your trading partners mean when they "require EDI."

850 — the purchase order

The buyer's order, as data: who's buying, what items (by UPC or vendor SKU), quantities, prices, requested dates, ship-to. When a chain "sends you 850s," their system is placing orders directly into yours — no fax, no rekeying. As a distributor you also send 850s upstream to your own suppliers.

855 — the acknowledgment

The seller's answer to an 850: accepted, accepted-with-changes, or rejected — line by line. This is where you communicate shorts and substitutions before the truck rolls, which is precisely what keeps deduction disputes off your invoices later.

856 — the advance ship notice

What's actually on the truck, in the cartons, on the pallets — sent before arrival so the receiver can check in the delivery by scanning instead of counting against paper. Chains fine suppliers for late or inaccurate 856s, so generating it straight from your pick data (not retyping it) matters.

810 — the invoice

The bill, as data, matched automatically by the buyer against the 850 and 856. When all three agree, you get paid without a human touching it. When they don't, you get a deduction. The whole game of EDI hygiene is making the three documents agree because they came from the same system.

What breaks without them

Every gap becomes manual work at the worst time: orders rekeyed (and mis-keyed) at cutoff, shorts discovered at the back door, invoices disputed weeks later. Distributors who trade clean EDI are simply cheaper to buy from — which is why chains require it.

DistroLync OMS ships with these four documents built in — 850s out to your suppliers, and 855 / 856 / 810 flowing back into the same orders they answer — no separate EDI vendor, no per-document fees from us. If you've been quoted a five-figure EDI project, talk to us first.