When a sales contract leaves something out, the Uniform Commercial Code usually keeps the deal alive by supplying a default term. These UCC gap fillers cover price, place and time of delivery, payment timing, implied warranties, risk of loss in transit, and the notice required to end an open-ended supply arrangement. The one term courts will not supply is quantity. If the writing doesn’t say how much, the contract is enforceable only up to whatever amount the document actually states.1Legal Information Institute. UCC 2-201 – Formal Requirements; Statute of Frauds
The One Gap Courts Won’t Fill: Quantity
For a sale of goods priced at $500 or more, the statute of frauds requires a writing, and that writing locks in the maximum enforceable quantity.1Legal Information Institute. UCC 2-201 – Formal Requirements; Statute of Frauds A missing price or delivery date is routine for a court to fix. A missing quantity leaves nothing for the default rules to attach to.
There is one practical workaround built into the Code. Requirements contracts (buyer agrees to purchase all of a good from one seller) and output contracts (seller agrees to deliver everything produced to one buyer) are enforceable even without a stated number, because the quantity is tied to the parties’ actual operations.2Legal Information Institute. UCC 2-306 – Output, Requirements and Exclusive Dealings These arrangements still have limits. The quantity demanded or tendered can’t be unreasonably disproportionate to any stated estimate, or to prior normal volumes if no estimate exists, and both sides must act in good faith (honesty in fact plus reasonable commercial standards of fair dealing).3Legal Information Institute. UCC 1-201 – General Definitions
Price Left Open
A contract can form even when the parties never set a price. If the writing is silent, or if the parties planned to agree later and never did, a court supplies a reasonable price at the time of delivery.4Legal Information Institute. UCC 2-305 – Open Price Term The same rule applies when the contract pegs price to an outside benchmark that never gets published. Judges typically look to fair market value for the relevant industry and area.
If the contract gives one party the power to fix the price, that party must do so in good faith. When bad faith or interference by one side blocks the price from being set, the other side can walk away or set a reasonable price on their own. There is a narrower situation where parties specifically intended to be bound only if a price was agreed. If they tried and failed, no contract exists, but anything already delivered must be returned or paid for at reasonable value, and any payments already made must be refunded.4Legal Information Institute. UCC 2-305 – Open Price Term
Where and When Delivery Happens
If the contract doesn’t say where to deliver, the default location is the seller’s place of business. A seller without one uses their home. When both parties know at the time of contracting that the goods are sitting somewhere else, that location governs instead.5Legal Information Institute. UCC 2-308 – Absence of Specified Place for Delivery
Timing is a “reasonable time” standard, which flexes with the goods, the logistics, and industry norms.6Legal Information Institute. UCC 2-309 – Absence of Specific Time Provisions; Notice of Termination A pallet of stock fasteners and a custom-built piece of industrial equipment run on different clocks, and the statute avoids hard numbers for that reason.
The default also calls for a single-lot delivery, with payment due only on that full delivery. When circumstances make a single shipment impractical, either side can require installments, with the price divided proportionally among them.7Legal Information Institute. UCC 2-307 – Delivery in Single Lot or Several Lots
What FOB and FAS Actually Mean
Shipping shorthand carries real legal weight. “FOB place of shipment” means the seller’s job ends when the goods reach the carrier; the buyer bears cost and risk from there. “FOB place of destination” shifts cost and risk onto the seller all the way to the named destination.8Legal Information Institute. UCC 2-319 – FOB and FAS Terms
“FAS” (free alongside) requires the seller to deliver the goods alongside the vessel at the designated port and obtain a receipt entitling the carrier to issue a bill of lading. The buyer owes timely shipping instructions, including vessel name and loading berth. A buyer who doesn’t provide them can be treated as failing to cooperate with the seller’s performance.8Legal Information Institute. UCC 2-319 – FOB and FAS Terms
Payment Timing and Inspection
Payment is due at the time and place the buyer receives the goods, unless the contract says otherwise.9Legal Information Institute. UCC 2-310 – Open Time for Payment or Running of Credit; Authority to Ship Under Reservation The Code assumes a simultaneous swap, with no credit period implied. If the seller wants to extend credit, the contract must say so.
Payment by check is acceptable because a check is current in the ordinary course of business, but it counts only as conditional payment. A bounced check defeats the payment entirely.10Legal Information Institute. UCC 2-511 – Tender of Payment by Buyer; Payment by Check A seller who wants cash can demand it, but must give the buyer a reasonable extension to obtain it.
Before paying, the buyer has a default right to examine the goods to confirm they match the contract.9Legal Information Institute. UCC 2-310 – Open Time for Payment or Running of Credit; Authority to Ship Under Reservation The right survives even when the seller ships under reservation. Inspection can happen at any reasonable place, time, and manner, and the buyer pays for it. If the goods turn out to be nonconforming and the buyer rejects them, the inspection cost shifts back to the seller.11Legal Information Institute. UCC 2-513 – Buyers Right to Inspection of Goods
Warranties the UCC Writes In
Even a contract silent on quality carries built-in promises about the goods. These are among the most consequential gap fillers because sellers often make them without realizing it.
Merchantability
A merchant who regularly deals in goods of a particular kind automatically warrants that those goods are merchantable: fit for the ordinary purposes buyers put them to, able to pass without objection in the trade, adequately packaged and labeled, and matching any container descriptions.12Legal Information Institute. UCC 2-314 – Implied Warranty: Merchantability; Usage of Trade The warranty only attaches when the seller is a merchant for that type of good. A homeowner selling a used lawnmower at a garage sale doesn’t trigger it.
Fitness for a Particular Purpose
A narrower warranty arises when the seller knows the buyer has a specific, non-ordinary use in mind and the buyer is relying on the seller’s skill to pick the right product.13Legal Information Institute. UCC 2-315 – Implied Warranty: Fitness for Particular Purpose If the buyer explains an unusual application and asks for a recommendation, whatever the seller recommends is warranted to work. The seller does not need to be a merchant for this one to apply.
Title
Every sale carries a default promise that the seller owns the goods, that the transfer is rightful, and that the goods are free from undisclosed liens or security interests.14Legal Information Institute. UCC 2-312 – Warranty of Title and Against Infringement; Buyers Obligation Against Infringement Merchants who regularly deal in that type of good also warrant that the goods don’t infringe third-party intellectual property rights. The title warranty can only be excluded through specific language or circumstances that make clear the seller isn’t claiming full title.
How Sellers Disclaim
Disclaimers are allowed, but the Code sets form requirements. To disclaim merchantability, the disclaimer must use the word “merchantability,” and any written disclaimer must be conspicuous. A disclaimer of the fitness warranty must be written and conspicuous.15Legal Information Institute. UCC 2-316 – Exclusion or Modification of Warranties
Shortcuts exist. Selling “as is” or “with all faults” excludes all implied warranties when the language makes the exclusion plain. A buyer who has examined the goods before buying, or refused an opportunity to examine them, loses warranty protection for defects a reasonable inspection would have revealed. Course of dealing, course of performance, and trade usage can also exclude implied warranties.15Legal Information Institute. UCC 2-316 – Exclusion or Modification of Warranties
Who Bears the Loss in Transit
When goods are destroyed or damaged in transit and the contract is silent on risk, the answer turns on whether the deal is a shipment or destination contract. Under a shipment contract, risk passes to the buyer when the seller delivers the goods to the carrier, even when the seller ships under reservation.16Legal Information Institute. UCC 2-509 – Risk of Loss in the Absence of Breach Under a destination contract, the seller carries the risk until the goods reach the named destination and the buyer can take delivery. Whichever party holds the risk should be the one insuring the goods in transit.
A breach reshuffles the defaults. If the seller ships nonconforming goods the buyer can reject, risk stays on the seller until the defect is cured or the buyer accepts the goods.17Legal Information Institute. UCC 2-510 – Effect of Breach on Risk of Loss If the buyer breaches or repudiates before risk has passed, the seller can treat risk as resting on the buyer for a commercially reasonable time, but only to the extent the seller’s own insurance doesn’t cover the loss. The party at fault ends up carrying the uninsured piece.
Ending an Open-Ended Supply Deal
Some supply arrangements call for repeated deliveries with no end date. The Code treats them as valid for a reasonable time, and either side can terminate at any time, but reasonable notice is required.6Legal Information Institute. UCC 2-309 – Absence of Specific Time Provisions; Notice of Termination You cannot cut off a supplier of several years overnight and leave them holding inventory built for you.
Any agreement that tries to eliminate the notice requirement is invalid if enforcing it would be unconscionable.6Legal Information Institute. UCC 2-309 – Absence of Specific Time Provisions; Notice of Termination What counts as reasonable notice depends on the length of the relationship, how much the other side has invested in reliance on the contract, and the time it would take to find a replacement.
How Courts Read Between the Lines
When a court has to figure out what the parties meant, it works through a ranked set of external evidence under UCC 1-303. Express contract terms come first. Below them sit three layers of context.18Legal Information Institute. UCC 1-303 – Course of Performance, Course of Dealing, and Usage of Trade
Course of performance carries the most weight. It looks at how the parties have actually behaved under the current contract. If a seller has been accepting partial monthly payments without complaint, that pattern defines the payment terms regardless of what the writing says or leaves out.
Course of dealing comes next, examining the parties’ history across earlier transactions. If two companies have done business for a decade and have always handled returns within 30 days, a court can reasonably read the same practice into the current contract.18Legal Information Institute. UCC 1-303 – Course of Performance, Course of Dealing, and Usage of Trade
Usage of trade sits at the bottom but still carries real force. These are the widely observed customs within a specific industry. If everyone in a trade routinely allows a 2% discount for early payment, a court can read that expectation into a contract between parties in that trade even when the writing never mentions it.18Legal Information Institute. UCC 1-303 – Course of Performance, Course of Dealing, and Usage of Trade
What a Merger Clause Changes
External evidence has a limit. If the contract contains a merger or integration clause stating that the document is the complete and exclusive statement of the parties’ agreement, courts become far more restrictive about what outside material they will consider. Under the UCC’s parol evidence rule, a writing intended as the final expression cannot be contradicted by evidence of prior agreements or contemporaneous oral promises.19Legal Information Institute. UCC 2-202 – Final Written Expression: Parol or Extrinsic Evidence
Even with a merger clause, course of performance, course of dealing, and usage of trade can still explain or supplement the written terms. The clause blocks consistent additional terms from coming in through outside evidence, but it does not erase industry customs or the parties’ own behavioral patterns. This is where the UCC parts ways with stricter common law parol evidence doctrines, and it is a distinction that catches parties off guard in litigation.