There are two separate agreements in play here.
1. The freelancer made an agreement with Upwork. In exchange for the freelancer performing work for a client, the freelancer will receive payment by Upwork.
2. The client made an agreement with Upwork. In exchange for arranging for a freelancer to perform work for them, the client will send payment to Upwork.
If the client fails to adhere to agreement #2, that doesn't give Upwork grounds to unilaterally cancel agreement #1. Upwork has been scammed, and unless they are claiming that the freelancer was part of the scam, they have no moral right to cancel agreement #1.
Edit: In support of this interpretation, Upwork's tax requirements indicate that freelancers must file a W-9 with Upwork, not with the client. This indicates that Upwork is the entity paying the freelancer, not merely acting as a payment facilitator between the client and the freelancer.
[0] https://support.upwork.com/hc/en-us/articles/211067918-Tax-R...
This is not the same as Upwork refusing to continue working with the freelancer. This is Upwork attempting to modify the terms for previous work done by the freelancer.
its like arguing that homeopathy shitheads that 'helps with cancer' are not scammers because of placebo effect
One form of actual piece-of-plastic physical card that's popular here in Finland is the combination debit-credit card. When I insert it into the checkout payment terminal it first gives me a selection of "Debit / Credit?", then I tap in my PIN, and then it either charges my bank account or my credit card, depending on which I selected in the first step.
These same cards work in ATMs, and abroad too. I lifted cash in Turkey ten years ago, I think from Visa (IIRC my bank switched to MasterCard after that). In Sweden, supermarket payment terminals have one or two steps more: you need to confirm the amount, and if you want you can tap in an additional amount and have the cashier hand you cash in stead of going to an ATM. (Can't recall the order for sure; I think confirming the amount came first, before even selecting credit/debit, and the additional withdrawal last.) Never seen the amount confirmation in Finland; I suppose here it's taken for granted that it'll be the same as what the cashier just told you (and what you can see on the customer-facing display of their register, usually right next to the payment terminal). The additional cash withdrawal does exist (or at least did, can't recall when I last saw it) in some shops, but it's rare.
I don't think chargeback policies are a major influence either way.
It is a chargeback because of fraudulent card misuse which should have been vetted by Upwork OR the payment provider. It is not the freelancers responsibility to do the payment or vetting. If it was their responsibility, you could cut Upwork out after the first transaction, but you can’t.
One of two people should be missing out here: Upwork for failing to verify the credit card or the actual persons bank for kit identifying fraudulent transactions.
I don't understand why. This isn't how it works with other systems. If I get a ton of chargebacks on Paypal, they'll try to take the money back out of my bank account. And if they can't they'll grab it later the next time someone pays me (what Upwork is doing here). And if even that won't work, they'll just close my account. There's no scenario where PayPal is expected to continue working with me, because I'm now a fraud risk in their eyes.
Ditto on Amazon: get a bunch of returns and you'll need to make that up or be cancelled.
People are not really understanding the situation here. The OP's complaint isn't that Upwork is suing him or otherwise attempting to force payment. It's just that Upwork won't work with him anymore unless they get their losses covered.
And... maybe that's not fair, but that's how life works on the internet of payments. Upwork's behavior is very typical here, and no one should be surprised.