To accept a purchase order, verify that every line item, price, and term on the PO matches what you quoted, then communicate clear agreement from someone authorized to bind your company. That agreement can take the form of a signed and returned PO, a click-through confirmation in the buyer’s procurement portal, a returned acknowledgment copy, or, in some cases, simply shipping the goods. Under the Uniform Commercial Code, a contract for the sale of goods can form through any of these routes.{1Cornell Law School. Uniform Commercial Code 2-204 – Formation in General} The route you choose, and what you check before you take it, determines whose terms actually govern the deal.
Review the PO Against Your Quote First
Before any signature or click, compare the PO line by line against the quote or price list you sent. The PO number is your anchor for every invoice and shipping document that follows, so confirm it ties back to your original bid or quote reference.
Then work through the substance:
- SKUs, product descriptions, and units of measure against your catalog. A buyer who writes a case quantity when they meant individual units can flip a profitable order into a loss.
- Quantities and unit pricing against your most recent quote. Small per-unit discrepancies compound quickly on large orders.
- Payment terms. Net 30 means payment 30 days after invoicing; Net 60 stretches that to two months. If the PO says Net 60 and your standard is Net 30, the carrying cost is real. Flag it now.
- Delivery date against your production schedule, inventory, and supplier lead times.
- Shipping terms. FOB Destination leaves risk of loss with you until goods arrive at the buyer’s location; FOB Shipping Point transfers that risk to the buyer when the carrier takes possession.{} That difference affects your insurance and carrier choices.2Legal Information Institute (LII) / Cornell Law School. Free on Board (FOB)
Anything that doesn’t match belongs on the table before acceptance, not after production starts.
How to Formally Accept the PO
Formal acceptance happens when an authorized person at your company communicates clear agreement to the PO terms. The most direct method is signing and returning the document. Federal law treats electronic signatures the same as handwritten ones for commercial transactions, so a digital signature or a click-through “Accept” in a procurement portal carries the same legal weight as ink on paper.{3Office of the Law Revision Counsel. 15 USC Chapter 96 – Electronic Signatures in Global and National Commerce}
If the buyer uses an ERP system or supplier portal, acceptance usually means logging in, reviewing the order on a dashboard, and clicking confirm. The system timestamps the action and notifies the buyer automatically, which creates a clean audit trail. Larger buyers often expect this workflow and may not treat an emailed PDF as a substitute.
Some buyers include a separate acknowledgment copy in the PO package and ask you to return that specific document. Returning it by email, file transfer, or mail completes the acceptance. Whichever route you use, two things have to be true: the response shows unambiguous agreement to the terms as stated, and it comes from someone with authority to bind your company. A statute-of-frauds-quality written or electronic record is the safe default regardless of dollar amount.
When Your Terms Don’t Match the Buyer’s
Most sellers keep their own boilerplate: a limitation of liability, a specific warranty period, an arbitration clause. When you fire back an acknowledgment with those terms attached, they rarely line up with what the buyer put in the PO. Contract law has a name for this: the battle of the forms.
Under UCC Section 2-207, your acknowledgment still counts as a valid acceptance even if it includes different or additional terms, unless you explicitly condition your acceptance on the buyer agreeing to your terms. If both sides are merchants (which covers most B2B transactions), your additional terms automatically become part of the contract unless they materially alter the deal, the buyer objects within a reasonable time, or the original PO limited acceptance to its own terms.{4Legal Information Institute (LII). Uniform Commercial Code 2-207 – Additional Terms in Acceptance or Confirmation}
A material change is anything that would surprise or create hardship for the other side: arbitration clauses, warranty disclaimers, damages caps. Those don’t slip in quietly. Minor additions like specifying standard packaging are more likely to survive. If you actually want your terms to govern, get the buyer to agree to them explicitly before fulfillment begins. Boilerplate stapled to an acknowledgment form is a gamble most sellers lose.
Rejecting or Countering Instead
You’re never obligated to accept. If pricing, timing, or terms don’t work, you can reject outright or counter with a revised version showing the terms you’d accept. A counter-offer is legally a rejection of the original PO combined with a new proposal, which moves the ball back to the buyer. Put the counter in writing, identify exactly what you’re changing and why, and set a deadline for a response. Do not go silent and then start shipping. Silence followed by performance usually reads as acceptance.
Acceptance by Shipping the Goods
You don’t always need a signature to form the contract. Under UCC Section 2-206, when a buyer sends a PO for prompt shipment, that order invites acceptance either through a promise to ship or by the act of shipping.{5Cornell Law School. Uniform Commercial Code 2-206 – Offer and Acceptance in Formation of Contract} The moment you hand a conforming shipment to a carrier, you’ve accepted the PO and formed a binding contract.
This is useful when speed matters and paperwork would slow things down, but it comes with two costs. First, you’re bound by the buyer’s terms exactly as written; your window to add your own conditions is closed. Second, if you don’t notify the buyer of acceptance within a reasonable time, the buyer can treat the offer as expired even if you’ve already started work.
There is one escape valve. If you can’t fill the order as specified but want to ship what you have as a favor, you can send non-conforming goods as an “accommodation shipment” without it counting as acceptance, provided you notify the buyer before or with the shipment that it’s offered only as an accommodation. Skip that notice and the shipment becomes acceptance of the PO, and you’re exposed to a breach claim for sending the wrong goods.
Once You’ve Accepted: What Changes
Perfect Tender
After acceptance, what you deliver has to match the contract exactly. Under UCC Section 2-601, if the goods or the delivery fail to conform in any respect, the buyer can reject the whole shipment, accept it all, or accept some units and reject the rest.{6Cornell Law School. Uniform Commercial Code 2-601 – Buyers Rights on Improper Delivery} Wrong color, wrong packaging, short a few units: any deviation is grounds for rejection. This is especially sharp for sellers who accept by performance, because a mistake in the shipment breaches the contract on the same day it forms one. Build in a quality check before anything leaves the dock.
Send an Order Acknowledgment
After accepting, send the buyer an order acknowledgment confirming the PO number, the confirmed line items, and your expected ship date. It isn’t strictly required to form the contract, but it functions as a receipt that moves the transaction into fulfillment.{7Oracle. Buyer Workspace and Supplier Self Service Implementation Guide – Understanding Purchase Order Acknowledgement and Change Approvals} It’s also your last chance to flag anything unusual: a shift in the ship date, a SKU on backorder, a substitution. Most companies send acknowledgments through automated email or Electronic Data Interchange feeds into the buyer’s procurement system.
Modifying the Order Later
Business shifts. Quantities grow, delivery addresses change, ship dates slide. Under UCC Section 2-209, a modification of a sales contract is binding even without new consideration from either side.{8Cornell Law School. Uniform Commercial Code 2-209 – Modification, Rescission and Waiver} The buyer doesn’t have to offer anything extra to make a change stick, and neither do you. Both sides just have to agree.
In practice the change flows through a formal change order or revised PO. Review it, confirm you can accommodate the new terms, and accept it the same way you accepted the original. Get the change in writing before you work against it. Verbal modifications can be valid under the UCC, but proving what was said in a dispute is a fight worth avoiding. And if the original PO or your contract requires modifications in writing, that clause is enforceable and verbal changes won’t hold up.
What Breach Costs You
Accepting and then failing to deliver isn’t just a broken promise. Under UCC Section 2-711, if a seller fails to deliver or the buyer rightfully rejects non-conforming goods, the buyer can cancel and recover any payments already made.{9Cornell Law School. Uniform Commercial Code 2-711 – Buyers Remedies in General} The buyer can also “cover” by buying substitute goods elsewhere and charging you the price difference, plus damages that flow naturally from the breach, which can include lost profits if your failure shut down their production or cost them their own customer commitments.
Many POs also carry liquidated damages clauses setting a fixed daily or weekly penalty for late delivery, common in government and large commercial contracts. If your PO has one, exposure starts accumulating on the first missed day. Reason enough to flag delivery risk during the pre-acceptance review rather than after you’re committed.
Keep the Paper Trail
Retain every document in the chain: the original PO, your signed acceptance or system confirmation, the order acknowledgment, any change orders, shipping documents, and the final invoice. If a dispute surfaces later, your file is your defense. Commercial statutes of limitation on sales-contract claims commonly run between four and six years, so hold records at least that long, and store them somewhere searchable. The seller who can pull a clean, complete file usually wins the argument.