Chargeback
A card payment a buyer's bank reverses after they dispute it, pulling the money back out of the seller's account, usually with a fee on top.
A chargeback happens when someone who paid with a card tells their bank they want the charge undone, maybe because they do not recognize it, never got what they ordered, or simply changed their mind. The bank looks into it, and if it sides with the buyer, it cancels the payment and sends the money back. The seller can lose the sale, the product, and a fee the card network adds on top.
For anyone selling with cards, chargebacks come with the territory. You handle each dispute inside your own payment account, send in whatever proof you have, and wait for the bank to decide. Running a static site with no server does not change that part. As long as a card is involved, a card network sits in the middle, and that network is what makes a reversal possible.
The ways to get paid that never touch a card network do not have chargebacks at all. Crypto settles straight into a wallet you control, with no bank that can claw it back later. Pay by mail works the same way, because the money is already in your hands before you mark the order done. Coin Moebius lets you offer cards, crypto, and pay by mail from the same button, so you can take the card sales you want and lean on the other options when a reversal is a risk you would rather skip.
Get paid without the plumbing
Coin Moebius is the part behind the button, so you do not have to build it.