Bad-faith dispute: the one who denies what they did buy and the parent disputing in good faith leave the same trace

How it attacks

They buy with their own card. They are the cardholder, at home, on their usual phone, at a normal hour. They enter the CVC and clear the bank check without any trouble, because all of it is theirs.

The purchase is legitimate. At the moment it happens there is nothing to object to, and any system looking at it will say yes.

They receive the product. They use it, resell it or give it to someone.

Weeks later they call the bank and say they do not recognise that charge. They ask for their money back, claiming someone used their card.

That is where it hits you: you are left without the product, without the money and with the administrative cost of the dispute. The fraud did not happen when they bought, it happened when they denied buying.

Who looks like it and is honest

The parent whose child used the card. The teenager took the physical card, bought a video game or a pair of trainers, and had the CVC because it was in their hand. The parent sees the charge, genuinely does not recognise it, and disputes in good faith.

The one who does not recognise the merchant name. They bought from a shop and the statement shows the legal name of the company that processes it, which looks nothing like it. They dispute because they genuinely do not know what that charge is.

The one who shares the card with their partner. One of them bought, the other goes through the accounts, and the charge shows up unexplained. The dispute comes out of a mix-up at home.

All three are disputing a charge they did make from their own home, and none of them is lying.

What actually separates them

• How many times it has happened to them.
  • The good-faith disputer: it happens once, or very rarely, and it is usually the first dispute of their life.
  • The bad-faith one: has a history of disputes spread across different merchants, which you cannot see when you only look at your own.
• Which product gets disputed.
  • The good-faith disputer: disputes whatever caught their eye on the statement, unrelated to how resellable it is.
  • The bad-faith one: their disputes land on things that hold value and change hands easily.
• What they did between the purchase and the dispute.
  • The good-faith disputer: complained, wrote to support, asked what that charge was before calling the bank.
  • The bad-faith one: goes straight to the bank without coming to you, because with you they would have to hold up a story.
• What the delivery trail says.
  • The good-faith disputer: sometimes the product never arrived, or arrived at an address that explains the confusion.
  • The bad-faith one: the product arrived at their usual address, they took delivery of it, and in many cases they kept using the account afterwards.
• What relationship they still have with you.
  • The good-faith disputer: keeps buying as normal, because to them it was a misunderstanding.
  • The bad-faith one: buys again and disputes again, or disappears right after the refund lands.
• What exactly they said.
  • The good-faith disputer: says they do not recognise the charge, and when you show them what it was, they often withdraw the dispute.
  • The bad-faith one: maintains their card was used without permission, even against the delivery evidence.

How it mutates once you detect it

This one does not mutate like the other eight. Their behaviour at the moment of buying is already that of a legitimate customer, so they have nothing to disguise. What changes is where they pick the fight.

1. You win the dispute with proof of delivery. Next time they change the reason: instead of saying it was not them, they say the product arrived different from what they ordered, or never arrived at all.
2. You keep evidence that they received it at their address. They move to buying things delivered without a physical trail, where proving delivery is harder.
3. You block their account after the first lost dispute. They open another with a different email, and show up as a new customer with the same card or another one of theirs.
4. You start checking dispute history before accepting. They space their disputes out over time and spread them across merchants, so they never pile up in one place.

Notice what those four reactions have in common: all of them happen after the sale. The fight with this one is played out in the evidence you kept and in what you learned from the outcome of the previous dispute.

Closing

If your defence lives only at the instant of the transaction, you never see this case. The purchase was flawless and your system did the right thing in accepting it.

That closes the series. Nine fraud types, each with the honest customer who leaves the same trace, and there are many more: new variants show up all the time. What repeats across the nine is the same question. The signal almost never tells you who someone is. It tells you who they resemble, and the work is telling those two apart without turning away the one who buys from you.

So how do you solve it?

Tuning this by hand takes days, and every day costs chargebacks and good sales. That is what we are solving at Frauddi. We will show you on your own data.

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This closes the series. All nine fraud types, each alongside the honest customer who looks like it, are in the series index.