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Sales Agreement Guide: Sales Contract, Invoice & Purchase Order (PO)

What you’ll learn: product/service specs, pricing & payment schedule (deposits/milestones), delivery terms & risk of loss (FOB/Incoterms), warranties/returns, acceptance & title transfer, breach remedies, and dispute resolution—plus how a Sales Agreement differs from an invoice or PO.

What Is a Sales Agreement

A Sales Agreement is a legally binding contract that outlines the key terms of a transaction between a buyer and a seller. It defines what's being sold, the purchase price, payment schedule, delivery terms, and what happens if something goes wrong—like delays, defects, or non-payment.

Whether you're selling products, equipment, or even digital goods, this agreement protects both parties by preventing misunderstandings and clearly documenting the deal from start to finish.

Why it matters: A well-drafted Sales Agreement ensures everyone’s on the same page—and gives you legal protection if the deal falls apart.

When to Use a Sales Agreement

    • Selling High-Value Items
      The higher the price tag, the higher the risk. A Sales Agreement locks in the terms and gives you legal protection if payment or delivery becomes an issue.
    • New Customer Relationships
      When you haven’t worked together before, a formal contract builds trust and ensures expectations are crystal clear from the start.
    • Clarify Delivery or Warranties
      If delivery timelines, shipping costs, or warranties could be disputed later, this agreement defines exactly who’s responsible for what—and when.
    • Custom Goods or Services
      For made-to-order products or tailored services, a Sales Agreement ensures you’re not left holding the bag if the buyer changes their mind.
    • Staged Payments or Deposits
      If you require a deposit or plan to invoice in phases, this agreement lays out the payment schedule to keep cash flow and expectations on track.

Checklist: What to Define

Product/Service Descriptions
Spell out exactly what’s being sold—model numbers, quantities, specifications, or service scope—so there’s no confusion post-purchase.

Pricing & Payment Schedule
List total cost, deposits (if any), and when each payment is due. This avoids late payments, billing issues, or underpayment.

Delivery Method & Timeline
Define how and when the buyer will receive the goods or services—plus who covers shipping and what happens if there’s a delay.

Warranties
State whether you’re offering any guarantees—and for how long. Helps manage expectations and limits liability for defects or breakdowns.

Breach Consequences
Clarify what happens if one party doesn’t hold up their end of the deal—like missed payments, late delivery, or refusal to accept goods.

Dispute Resolution
Choose how conflicts will be resolved—mediation, arbitration, or court—and under which state’s laws. A small clause that prevents big headaches.

Transfer of Ownership
Note when the buyer officially owns the product (e.g., at shipment or on delivery). This protects against liability or ownership confusion.

⚠️ No Product Clarity
If the product or service isn’t clearly described, the buyer can claim they didn’t get what they paid for—and you’ll have a hard time proving otherwise.

⚠️ No Refund or Cancel Terms
Without clear cancellation or refund language, you’re wide open to chargebacks, disputes, or unhappy customers demanding last-minute changes.

⚠️ No Delivery Timeline
Leaving out delivery deadlines creates uncertainty—and gives the buyer room to delay payment or walk away if things take longer than expected.

⚠️ No Dispute Clause
When issues arise (and they often do), a missing dispute clause means costly legal uncertainty. Even a basic mediation or jurisdiction clause can save time and money.

Sales Agreement vs. Invoice vs. Purchase Order

    • Sales Agreement = Full Sale Terms
      A legally binding contract that outlines the entire deal—what’s being sold, pricing, delivery terms, payment schedule, warranties, and more. Used to lock in expectations before the sale happens.
    • Invoice = Payment Request
      A billing document sent after the sale is agreed to. It requests payment based on the terms in the Sales Agreement (or sometimes a PO), listing due dates and payment instructions.
    • Purchase Order (PO) = Buyer’s Order Request
      A formal document issued by the buyer to request goods or services. It lists what they want to buy, how much, and when—serving as their offer before the seller confirms the deal.

Build Your Service Agreement

Build Your Sales Agreement

✅ Need to lock in pricing, delivery, and warranties before you sell?

Use SMVRT Legal’s Sales Agreement Template to define specs/quantities, price & payment schedule (deposits/milestones), delivery & risk of loss (FOB/Incoterms), warranties/returns, title transfer, cancellations, and dispute resolution—clear, enforceable, and ready to send.

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