Every merchant with a card terminal or a checkout page eventually gets the same phone call, or worse, the same silent debit from their settlement account. A customer disputed a charge. The money's gone. Now you have somewhere between 7 and 20 days to decide if it's worth fighting for.
Most owners either fight everything on principle or fight nothing because the process looks like a hassle. Both are expensive habits. The smarter move is knowing which chargebacks are winnable, which are a waste of your time, and how to keep your dispute ratio low enough that your processor doesn't start treating you like a liability.
Chargeback vs. Refund: They're Not the Same Fight
A refund is something you control. A customer asks, you approve, the money goes back, done.
A chargeback is the customer's bank pulling money out of your account without asking you first. Visa or Mastercard's rules let the cardholder's bank (the "issuing bank") reverse a transaction on the cardholder's say-so, and your processor (the "acquirer") has to comply immediately. You find out after the fact, usually with a reason code and a deadline to respond.
That distinction matters because it changes your leverage. With a refund, you're in charge. With a chargeback, you're playing defence on a clock, and if you don't respond with the right documentation in the right window, you lose automatically, even if you were completely in the right.
What a Chargeback Actually Costs You
The disputed amount is only part of the bill. Here's what typically stacks on top:
- A chargeback fee, usually $15 to $25 CAD per dispute, charged by your processor regardless of who wins.
- The lost sale itself, plus whatever it cost you in materials, inventory, or labour to fulfill it.
- Your dispute ratio moving the wrong way. Visa and Mastercard track chargebacks as a percentage of your total transactions. Cross roughly 0.65% to 1% and you can land in a monitoring program, which usually means extra fees and closer scrutiny. Keep climbing and processors can put you on a higher-risk pricing tier or terminate your account outright.
So a $60 dispute that you ignore because "it's not worth the paperwork" isn't a $60 problem. It's a $60 problem plus a $20 fee plus one more mark against a ratio that determines whether your next processing statement gets more expensive.
The Four Buckets of Reason Codes
Canadian merchants mostly see chargebacks fall into four categories, and each one has a different winning strategy.
Fraud (Cardholder Doesn't Recognize the Charge)
This is the hardest bucket to win in card-not-present environments like e-commerce, because the network's default assumption favours the cardholder. If you took the payment in person with a chip-and-PIN or tap transaction, you're usually in decent shape, the liability sits with the card, not you. If it was online and you didn't use 3D Secure or a fraud-screening tool, you're fighting uphill.
Non-Receipt ("I Never Got It")
This is winnable if you have proof of delivery. Tracking numbers, signed delivery confirmations, or install completion sign-offs for services are your evidence. Say an e-commerce shop selling patio furniture out of Kitchener ships an order and the customer disputes it as "never received" three weeks later. If the shop has a tracking number showing delivery to the address on file, that's usually enough to win.
Not As Described / Defective
This is the murkiest bucket. Banks tend to side with the cardholder unless you have clear product descriptions, photos of the item as shipped, and any communication where the customer's complaint contradicts what they originally ordered. If a customer claims a rental company's excavator was "not as advertised" but your contract, photos, and equipment inspection sheet all match, you have a fighting chance.
Processing Errors (Duplicate Charge, Wrong Amount)
These are the easiest to win or, honestly, the easiest to avoid a fight entirely by just refunding before it becomes a dispute. If your point-of-sale system double-billed someone, don't fight it. Refund it the moment you notice and save yourself the fee and the ratio hit.
The Decision Framework: Fight or Fold
Before you spend an hour building a dispute packet, run the transaction through three questions.
Do you have documentation that directly contradicts the customer's claim? Not "I'm pretty sure we delivered it," but an actual signature, tracking scan, or service log. If you're relying on memory, you're going to lose.
Is the dollar amount worth the time? A $40 dispute on a low-margin retail item might not be worth an hour of your bookkeeper's time pulling records. A $600 dispute on a custom order almost always is.
Is this a one-off or a pattern? If the same customer, the same product line, or the same delivery method keeps generating disputes, the fix isn't fighting each one individually, it's changing the process that's causing them. Winning the battle while losing the war on your ratio is a bad trade.
A rough rule that holds up across most SMB categories: fight anything over $75 where you have real documentation, and skip anything under $25 unless it's part of a repeat pattern worth flagging to your processor.
Building a Dispute Packet That Actually Wins
When you do fight, structure matters as much as content. Issuing banks and card networks review these fast, so make it easy to say yes to you.
- Lead with the strongest evidence first, not a chronological story. If you have a signed delivery slip, that goes on page one.
- Match the reason code. If the dispute is coded as non-receipt, don't waste space arguing about product quality. Answer the specific claim.
- Include the transaction footprint: IP address and device data for online orders, AVS and CVV match results, and the exact billing descriptor that appeared on the statement. A surprising number of "fraud" disputes are actually customers who forgot they bought something because your business name on the statement didn't match your storefront name.
- Keep communication records. Emails or texts where the customer confirms receipt, describes the item favourably, or requests a return (rather than claiming non-delivery) are some of the most persuasive evidence you can submit.
Prevention Beats Fighting, Every Time
Winning disputes is a defensive skill. Reducing how many you get in the first place is the actual lever that protects your ratio and your fees.
For in-person businesses: use chip and PIN or tap wherever possible, since it shifts fraud liability away from you. Keep detailed transaction records, especially for higher-ticket sales like construction deposits or dental treatment plans.
For e-commerce: turn on address verification (AVS) and CVV matching, use a billing descriptor that clearly matches your brand name, and get delivery or install confirmation on every order over your average ticket size. Consider 3D Secure for higher-risk categories, it shifts liability for authenticated transactions back to the card issuer.
For recurring billing (subscriptions, memberships, service contracts): send a receipt immediately and make cancellation easy to find. A large share of subscription-related chargebacks are actually customers who couldn't figure out how to cancel and used the dispute process instead. That's a UX problem wearing a fraud costume, and no amount of paperwork wins that fight if your cancel button is buried three menus deep.
Watch Your Ratio Like You Watch Your Margins
Most processors will show you your chargeback ratio somewhere in your merchant portal, though a lot of merchants never look. Check it monthly. If it's creeping toward 0.5%, treat that as a warning sign the same way you'd treat a rising food cost percentage or a slipping labour margin. The fix is almost always upstream: better delivery confirmation, clearer product photos, a billing descriptor customers recognize, or a cancellation flow that doesn't make people reach for their bank instead of your support line.
Chargebacks aren't going away, and fighting every single one isn't the goal. The goal is knowing which ones you can actually win, building the habit of collecting the right evidence before you need it, and fixing the process gaps that generate repeat disputes in the first place. That's the difference between a merchant who treats chargebacks as a cost of doing business and one who treats them as a line item quietly eating their margin.
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