Cash flow is the lifeblood of any supplier business, and the EDI 810 Invoice is the electronic document that triggers payment. Get it right and your invoice flows straight into the buyer's accounts payable system without a single human touch. Get it wrong and your invoice sits in a rejection queue while your receivables age and your working capital tightens.
What Is an EDI 810?
The 810 is the electronic equivalent of a paper invoice. It is sent by the supplier to the buyer after goods have shipped (typically after the 856 Advance Ship Notice has been transmitted) and requests payment for the transaction. A well-formed 810 must include:
- Invoice number and date — unique to each billing event
- PO reference number — must match the original 850 exactly
- Seller and buyer identification — EDI-assigned qualifiers for both parties
- Line-item detail — item number, UPC, quantity invoiced, unit price, and extended amount for each line
- Allowances and charges — freight costs, promotional discounts, or any agreed adjustments
- Payment terms — net days, discount terms if applicable
- Total invoice amount — must reconcile exactly with line-item totals
Why 810 Rejections Are So Costly
An 810 rejection does not just delay payment — it resets the payment clock entirely. A buyer's AP system that receives a malformed 810 may reject it silently or flag it for manual review. In either case, the supplier often does not find out until they chase the invoice manually, days or weeks later. By that point, payment terms have already slipped.
Common rejection causes include:
- PO number on the 810 does not match the 850 on file
- Invoice total does not match the sum of line-item amounts
- Missing or invalid allowance codes
- Invoicing for quantities that were not in the original PO or that were shorted on the shipment
- Duplicate invoice numbers
The 810 in the Order-to-Cash Workflow
The 810 sits at the end of a chain of linked documents. A complete, automated order-to-cash cycle looks like this:
- Buyer sends 850 (Purchase Order)
- Supplier sends 855 (PO Acknowledgment)
- Supplier ships and sends 856 (Advance Ship Notice)
- Supplier sends 810 (Invoice)
- Buyer sends 820 (Payment confirmation) or remittance advice
Each document in the chain references the PO number from the original 850. The 810 must match the quantities and items from the 856 — buyers reconcile these automatically and will flag any discrepancy.
Automating the 810 for Faster Payment
The fastest payment cycles belong to suppliers who automate 810 generation. When your EDI platform generates the invoice automatically upon shipment confirmation — pulling quantities and pricing directly from the 850 — you eliminate the delay between shipment and billing, reduce keying errors to zero, and ensure every 810 references the correct PO. Days-sales-outstanding drops. Cash flow improves. Disputes become rare.