What is a chargeback?
It is not a refund, and the merchant does not get a vote.
The customer disputes with the issuer. The money reverses along the same rails, in reverse.
It is not a refund, and here is why that matters
A refund is voluntary. You ask the shop, the shop agrees, the shop returns your money. Everyone remains on speaking terms.
A chargeback is not that. It is your bank reaching through the network and clawing back the settlement. It is force, applied politely, through infrastructure. The merchant finds out after it has happened.
How the machine runs
You dispute a transaction. Your bank files it under a reason code drawn from the network's rulebook: goods not received, transaction not authorised, item not as described, and dozens more, each with its own evidence requirements and deadlines.
The money is typically pulled back from the merchant immediately. If the merchant wants it returned, they must fight for it: assemble an evidence packet with proof of delivery, correspondence, signed receipts, and logs, and submit it inside a strict window. Miss the deadline and they lose automatically.
The customer files a sentence. The merchant files a dossier.
It is a returns desk where the customer can take the money out of the till themselves, and the shop has two weeks to prove they should not have.
Why the system is deliberately tilted
Because that tilt is what made card payments conquer the world. Handing your card details to a stranger on the internet feels safe precisely because this reversal mechanism exists behind you. Every purchase carries quiet insurance.
The premium for that insurance is paid by merchants: in fees, in lost disputes, and in the cost of fighting them.
The number that ends businesses
For a merchant, the individual chargeback is rarely the danger. The ratio is. Card networks monitor every merchant's dispute rate, and crossing certain thresholds gets a business classified as high risk: reserves held back, settlements slowed, and in the worst case the account terminated. In a card economy, that is close to a commercial death sentence.
Thresholds are typically expressed as a fraction of one percent of transactions, which sounds generous until you calculate it against your own volume.
Where you meet it
The "dispute this charge" button in your banking app. Use it for genuine wrongs without guilt, since you have already paid for the insurance in shelf prices. Contact the merchant first, though: it is faster for you and vastly cheaper for them.